CVE-2021-26401

LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

• kernel: avoid cyclic entity chains due to malformed USB descriptors (CVE-2020-0404)

• kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c (CVE-2020-13974)

• kernel: out-of-bounds read in bpf_skb_change_head() of filter.c due to a use-after-free (CVE-2021-0941)

• kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP() (CVE-2021-3612)

• kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts (CVE-2021-3669)

• kernel: out-of-bound Read in qrtr_endpoint_post in net/qrtr/qrtr.c (CVE-2021-3743)

• kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (CVE-2021-3744)

• kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

• kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (CVE-2021-3759)

• kernel: DoS in ccp_run_aes_gcm_cmd() function (CVE-2021-3764)

• kernel: sctp: Invalid chunks may be used to remotely remove existing associations (CVE-2021-3772)

• kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clients (CVE-2021-3773)

• kernel: possible leak or coruption of data residing on hugetlbfs (CVE-2021-4002)

• kernel: security regression for CVE-2018-13405 (CVE-2021-4037)

• kernel: Buffer overwrite in decode_nfs_fh function (CVE-2021-4157)

• kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)

• kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)

• kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)

• hw: cpu: LFENCE/JMP Mitigation Update for CVE-2017-5715 (CVE-2021-26401)

• kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)

• kernel: use-after-free in hso_free_net_device() in drivers/net/usb/hso.c (CVE-2021-37159)

• kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write (CVE-2021-41864)

• kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)

• kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c (CVE-2021-43389)

• kernel: mwifiex_usb_recv() in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker to cause DoS via crafted USB device (CVE-2021-43976)

• kernel: use-after-free in the TEE subsystem (CVE-2021-44733)

• kernel: information leak in the IPv6 implementation (CVE-2021-45485)

• kernel: information leak in the IPv4 implementation (CVE-2021-45486)

• hw: cpu: intel: Branch History Injection (BHI) (CVE-2022-0001)

• hw: cpu: intel: Intra-Mode BTI (CVE-2022-0002)

• kernel: Local denial of service in bond_ipsec_add_sa (CVE-2022-0286)

• kernel: DoS in sctp_addto_chunk in net/sctp/sm_make_chunk.c (CVE-2022-0322)

• kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes (CVE-2022-1011)

• kernel: use-after-free in nouveau kernel module (CVE-2020-27820)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

• kernel: avoid cyclic entity chains due to malformed USB descriptors (CVE-2020-0404)

• kernel: speculation on incompletely validated data on IBM Power9 (CVE-2020-4788)

• kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c (CVE-2020-13974)

• kernel: out-of-bounds read in bpf_skb_change_head() of filter.c due to a use-after-free (CVE-2021-0941)

• kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP() (CVE-2021-3612)

• kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts (CVE-2021-3669)

• kernel: out-of-bound Read in qrtr_endpoint_post in net/qrtr/qrtr.c (CVE-2021-3743)

• kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (CVE-2021-3744)

• kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

• kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (CVE-2021-3759)

• kernel: DoS in ccp_run_aes_gcm_cmd() function (CVE-2021-3764)

• kernel: sctp: Invalid chunks may be used to remotely remove existing associations (CVE-2021-3772)

• kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clients (CVE-2021-3773)

• kernel: possible leak or coruption of data residing on hugetlbfs (CVE-2021-4002)

• kernel: security regression for CVE-2018-13405 (CVE-2021-4037)

• kernel: Buffer overwrite in decode_nfs_fh function (CVE-2021-4157)

• kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)

• kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)

• kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)

• kernel: arm: SIGPAGE information disclosure vulnerability (CVE-2021-21781)

• hw: cpu: LFENCE/JMP Mitigation Update for CVE-2017-5715 (CVE-2021-26401)

• kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)

• kernel: use-after-free in hso_free_net_device() in drivers/net/usb/hso.c (CVE-2021-37159)

• kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write (CVE-2021-41864)

• kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)

• kernel: ppc: kvm: allows a malicious KVM guest to crash the host (CVE-2021-43056)

• kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c (CVE-2021-43389)

• kernel: mwifiex_usb_recv() in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker to cause DoS via crafted USB device (CVE-2021-43976)

• kernel: use-after-free in the TEE subsystem (CVE-2021-44733)

• kernel: information leak in the IPv6 implementation (CVE-2021-45485)

• kernel: information leak in the IPv4 implementation (CVE-2021-45486)

• hw: cpu: intel: Branch History Injection (BHI) (CVE-2022-0001)

• hw: cpu: intel: Intra-Mode BTI (CVE-2022-0002)

• kernel: Local denial of service in bond_ipsec_add_sa (CVE-2022-0286)

• kernel: DoS in sctp_addto_chunk in net/sctp/sm_make_chunk.c (CVE-2022-0322)

• kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes (CVE-2022-1011)

• kernel: use-after-free in nouveau kernel module (CVE-2020-27820)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

• kernel: avoid cyclic entity chains due to malformed USB descriptors (CVE-2020-0404)

• kernel: speculation on incompletely validated data on IBM Power9 (CVE-2020-4788)

• kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c (CVE-2020-13974)

• kernel: out-of-bounds read in bpf_skb_change_head() of filter.c due to a use-after-free (CVE-2021-0941)

• kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP() (CVE-2021-3612)

• kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts (CVE-2021-3669)

• kernel: out-of-bound Read in qrtr_endpoint_post in net/qrtr/qrtr.c (CVE-2021-3743)

• kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (CVE-2021-3744)

• kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

• kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (CVE-2021-3759)

• kernel: DoS in ccp_run_aes_gcm_cmd() function (CVE-2021-3764)

• kernel: sctp: Invalid chunks may be used to remotely remove existing associations (CVE-2021-3772)

• kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clients (CVE-2021-3773)

• kernel: possible leak or coruption of data residing on hugetlbfs (CVE-2021-4002)

• kernel: security regression for CVE-2018-13405 (CVE-2021-4037)

• kernel: Buffer overwrite in decode_nfs_fh function (CVE-2021-4157)

• kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)

• kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)

• kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)

• kernel: arm: SIGPAGE information disclosure vulnerability (CVE-2021-21781)

• hw: cpu: LFENCE/JMP Mitigation Update for CVE-2017-5715 (CVE-2021-26401)

• kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)

• kernel: use-after-free in hso_free_net_device() in drivers/net/usb/hso.c (CVE-2021-37159)

• kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write (CVE-2021-41864)

• kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)

• kernel: ppc: kvm: allows a malicious KVM guest to crash the host (CVE-2021-43056)

• kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c (CVE-2021-43389)

• kernel: mwifiex_usb_recv() in drivers/net/wireless/marvell/mwifiex/usb.c allows an attacker to cause DoS via crafted USB device (CVE-2021-43976)

• kernel: use-after-free in the TEE subsystem (CVE-2021-44733)

• kernel: information leak in the IPv6 implementation (CVE-2021-45485)

• kernel: information leak in the IPv4 implementation (CVE-2021-45486)

• hw: cpu: intel: Branch History Injection (BHI) (CVE-2022-0001)

• hw: cpu: intel: Intra-Mode BTI (CVE-2022-0002)

• kernel: Local denial of service in bond_ipsec_add_sa (CVE-2022-0286)

• kernel: DoS in sctp_addto_chunk in net/sctp/sm_make_chunk.c (CVE-2022-0322)

• kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes (CVE-2022-1011)

• kernel: use-after-free in nouveau kernel module (CVE-2020-27820)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• CVE-2022-1198
  • drivers: hamradio: 6pack: fix UAF bug caused by mod_timer()
• Bionic update: upstream stable patchset 2022-03-04 (LP: #1963717) // CVE-2020-36516
  • ipv4: avoid using shared IP generator for connected sockets
• CVE-2022-36879
  • xfrm: xfrm_policy: fix a possible double xfrm_pols_put() in xfrm_bundle_lookup()
• CVE-2022-3061
  • video: fbdev: i740fb: Error out if 'pixclock' equals zero
• CVE-2022-1516
  • net/x25: Fix null-ptr-deref caused by x25_disconnect
• CVE-2022-1205
  • ax25: Fix NULL pointer dereferences in ax25 timers
  • ax25: Fix UAF bugs in ax25 timers
• CVE-2022-2318
  • net: rose: fix UAF bugs caused by timer handler
• CVE-2022-1195
  • hamradio: defer 6pack kfree after unregister_netdev
  • hamradio: defer ax25 kfree after unregister_netdev
  • hamradio: improve the incomplete fix to avoid NPD
• CVE-2022-0494
  • block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
• CVE-2021-26401
  • x86/speculation: Use generic retpoline by default on AMD
• Bionic update: upstream stable patchset 2022-10-18 (LP: #1993349) // CVE-2022-39188
  • mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()
• Bionic update: upstream stable patchset 2022-10-06 (LP: #1992112) // CVE-2022-39188
  • mm: Force TLB flush for PFNMAP mappings before unlink_file_vma()
• CVE-2022-45934
  • Bluetooth: L2CAP: Fix u8 overflow
• Bionic update: upstream stable patchset 2022-06-21 (LP: #1979355) // CVE-2022-2991
  • lightnvm: disable the subsystem
• Bionic update: upstream stable patchset 2021-11-02 (LP: #1949512) // CVE-2021-4203
  • af_unix: fix races in sk_peer_pid and sk_peer_cred accesses
• Bionic update: upstream stable patchset 2022-04-26 (LP: #1970479) // CVE-2021-3772
  • sctp: fix the processing for INIT chunk
  • sctp: fix the processing for INIT_ACK chunk
• Bionic update: upstream stable patchset 2021-12-03 (LP: #1953202) // CVE-2021-3772
  • sctp: use init_tag from inithdr for ABORT chunk
  • sctp: fix the processing for COOKIE_ECHO chunk
  • sctp: add vtag check in sctp_sf_violation
  • sctp: add vtag check in sctp_sf_do_8_5_1_E_sa
  • sctp: add vtag check in sctp_sf_ootb
• CVE-2022-3303
  • ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC
• Bionic update: upstream stable patchset 2022-09-21 (LP: #1990434) // CVE-2022-1462
  • tty: extract tty_flip_buffer_commit() from tty_flip_buffer_push()
  • tty: use new tty_insert_flip_string_and_push_buffer() in pty_write()
• CVE-2022-1462
  • tty: fix deadlock caused by calling printk() under tty_port->lock
• Bionic update: upstream stable patchset 2020-11-10 (LP: #1903768) // CVE-2022-1462
  • pty: do tty_flip_buffer_push without port->lock in pty_write
• Bionic update: upstream stable patchset 2019-02-08 (LP: #1815234) // CVE-2022-1462
  • tty: Fix data race in tty_insert_flip_string_fixed_flag
• Bionic update: upstream stable patchset 2022-10-18 (LP: #1993349) // CVE-2022-4662
  • USB: core: Prevent nested device-reset calls
• Bionic update: upstream stable patchset 2022-03-04 (LP: #1963717) // CVE-2022-0617
  • udf: Restore i_lenAlloc when inode expansion fails
  • udf: Fix NULL ptr deref when converting from inline format
• Bionic update: upstream stable patchset 2022-04-26 (LP: #1970479) // CVE-2022-1016
  • netfilter: nf_tables: initialize registers in nft_do_chain()
• Bionic update: upstream stable patchset 2022-05-17 (LP: #1973831) // CVE-2022-2380
  • video: fbdev: sm712fb: Fix crash in smtcfb_read()
• Bionic update: upstream stable patchset 2022-05-17 (LP: #1973831) // CVE-2022-3111
  • power: supply: wm8350-power: Add missing free in free_charger_irq
• CVE-2022-3628
  • wifi: brcmfmac: Fix potential buffer overflow in brcmf_fweh_event_worker()
• Bionic update:…

• CVE-2022-1198
  • drivers: hamradio: 6pack: fix UAF bug caused by mod_timer()
• Bionic update: upstream stable patchset 2022-03-04 (LP: #1963717) // CVE-2020-36516
  • ipv4: avoid using shared IP generator for connected sockets
• CVE-2022-36879
  • xfrm: xfrm_policy: fix a possible double xfrm_pols_put() in xfrm_bundle_lookup()
• CVE-2022-3061
  • video: fbdev: i740fb: Error out if 'pixclock' equals zero
• CVE-2022-1516
  • net/x25: Fix null-ptr-deref caused by x25_disconnect
• CVE-2022-1205
  • ax25: Fix NULL pointer dereferences in ax25 timers
  • ax25: Fix UAF bugs in ax25 timers
• CVE-2022-2318
  • net: rose: fix UAF bugs caused by timer handler
• CVE-2022-1195
  • hamradio: defer 6pack kfree after unregister_netdev
  • hamradio: defer ax25 kfree after unregister_netdev
  • hamradio: improve the incomplete fix to avoid NPD
• CVE-2022-0494
  • block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern
• CVE-2021-26401
  • x86/speculation: Use generic retpoline by default on AMD
• Bionic update: upstream stable patchset 2022-10-18 (LP: #1993349) // CVE-2022-39188
  • mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()
• Bionic update: upstream stable patchset 2022-10-06 (LP: #1992112) // CVE-2022-39188
  • mm: Force TLB flush for PFNMAP mappings before unlink_file_vma()
• CVE-2022-45934
  • Bluetooth: L2CAP: Fix u8 overflow
• Bionic update: upstream stable patchset 2022-06-21 (LP: #1979355) // CVE-2022-2991
  • lightnvm: disable the subsystem
• Bionic update: upstream stable patchset 2021-11-02 (LP: #1949512) // CVE-2021-4203
  • af_unix: fix races in sk_peer_pid and sk_peer_cred accesses
• Bionic update: upstream stable patchset 2022-04-26 (LP: #1970479) // CVE-2021-3772
  • sctp: fix the processing for INIT chunk
  • sctp: fix the processing for INIT_ACK chunk
• Bionic update: upstream stable patchset 2021-12-03 (LP: #1953202) // CVE-2021-3772
  • sctp: use init_tag from inithdr for ABORT chunk
  • sctp: fix the processing for COOKIE_ECHO chunk
  • sctp: add vtag check in sctp_sf_violation
  • sctp: add vtag check in sctp_sf_do_8_5_1_E_sa
  • sctp: add vtag check in sctp_sf_ootb
• CVE-2022-3303
  • ALSA: pcm: oss: Fix race at SNDCTL_DSP_SYNC
• Bionic update: upstream stable patchset 2022-09-21 (LP: #1990434) // CVE-2022-1462
  • tty: extract tty_flip_buffer_commit() from tty_flip_buffer_push()
  • tty: use new tty_insert_flip_string_and_push_buffer() in pty_write()
• CVE-2022-1462
  • tty: fix deadlock caused by calling printk() under tty_port->lock
• Bionic update: upstream stable patchset 2020-11-10 (LP: #1903768) // CVE-2022-1462
  • pty: do tty_flip_buffer_push without port->lock in pty_write
• Bionic update: upstream stable patchset 2019-02-08 (LP: #1815234) // CVE-2022-1462
  • tty: Fix data race in tty_insert_flip_string_fixed_flag
• Bionic update: upstream stable patchset 2022-10-18 (LP: #1993349) // CVE-2022-4662
  • USB: core: Prevent nested device-reset calls
• Bionic update: upstream stable patchset 2022-03-04 (LP: #1963717) // CVE-2022-0617
  • udf: Restore i_lenAlloc when inode expansion fails
  • udf: Fix NULL ptr deref when converting from inline format
• Bionic update: upstream stable patchset 2022-04-26 (LP: #1970479) // CVE-2022-1016
  • netfilter: nf_tables: initialize registers in nft_do_chain()
• Bionic update: upstream stable patchset 2022-05-17 (LP: #1973831) // CVE-2022-2380
  • video: fbdev: sm712fb: Fix crash in smtcfb_read()
• Bionic update: upstream stable patchset 2022-05-17 (LP: #1973831) // CVE-2022-3111
  • power: supply: wm8350-power: Add missing free in free_charger_irq
• CVE-2022-3628
  • wifi: brcmfmac: Fix potential buffer overflow in brcmf_fweh_event_worker()
• Bionic update:…

• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-26373
  • x86/speculation: Add RSB VM Exit protections
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542)
  • Revert "x86/cpu: Add a steppings field to struct x86_cpu_id"
  • x86/cpufeature: Add facility to check for min microcode revisions
  • x86/cpufeature: Fix various quality problems in the <asm/cpu_device_hd.h> header
  • x86/devicetable: Move x86 specific macro out of generic code
  • x86/cpu: Add consistent CPU match macros
  • x86/cpu: Add a steppings field to struct x86_cpu_id
  • x86/cpufeatures: Move RETPOLINE flags to word 11
  • x86/bugs: Report AMD retbleed vulnerability
  • x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value
  • x86/entry: Add kernel IBRS implementation
  • x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS
  • x86/speculation: Add LFENCE to RSB fill sequence
  • KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS
  • x86/speculation: Fill RSB on vmexit for IBRS
  • x86/cpu/amd: Enumerate BTC_NO
  • x86/speculation: Disable RRSBA behavior
  • x86/bugs: Warn when "ibrs" mitigation is selected on Enhanced IBRS parts
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-29901
  • x86/bugs: Optimize SPEC_CTRL MSR writes
  • x86/bugs: Split spectre_v2_select_mitigation() and spectre_v2_user_select_mitigation()
  • x86/bugs: Report Intel retbleed vulnerability
  • entel_idle: Disable IBRS during long idle
  • x86/speculation: Change FILL_RETURN_BUFFER to work with objtool
  • x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n
  • x86/speculation: Fix firmware entry SPEC_CTRL handling
  • x86/speculation: Fix SPEC_CTRL write on SMT state change
  • x86/speculation: Use cached host SPEC_CTRL value for guest entry/exit
  • x86/speculation: Remove x86_spec_ctrl_mask
  • x86/common: Stamp out the stepping madness
  • x86/bugs: Add Cannon lake to RETBleed affected CPU list
  • x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl_current
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-29900
  • x86/bugs: Add AMD retbleed= boot parameter
• Bionic update: upstream stable patchset 2022-10-06 (LP: #1992112)
  • x86/bugs: Add "unknown" reporting for MMIO Stale Data
• CVE-2021-26401
  • x86/speculation: Warn about Spectre v2 LFENCE mitigation
  • x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT
• CVE-2022-0001
  • x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
• Bionic update: upstream stable patchset 2019-10-07 (LP: #1847155)
  • x86/cpu: Add Tiger Lake to Intel family
• CVE-url: https://ubuntu.com/security/CVE-2023-4622
  • af_unix: Fix null-ptr-deref in unix_stream_sendpage().
• CVE-url: https://ubuntu.com/security/CVE-2022-45919
  • media: dvb-core: Fix use-after-free due to race condition at dvb_ca_en50221
• Miscellaneous upstream changes
  • Revert "x86/enter: Use IBRS on syscall and interrupts"

• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-26373
  • x86/speculation: Add RSB VM Exit protections
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542)
  • Revert "x86/cpu: Add a steppings field to struct x86_cpu_id"
  • x86/cpufeature: Add facility to check for min microcode revisions
  • x86/cpufeature: Fix various quality problems in the <asm/cpu_device_hd.h> header
  • x86/devicetable: Move x86 specific macro out of generic code
  • x86/cpu: Add consistent CPU match macros
  • x86/cpu: Add a steppings field to struct x86_cpu_id
  • x86/cpufeatures: Move RETPOLINE flags to word 11
  • x86/bugs: Report AMD retbleed vulnerability
  • x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value
  • x86/entry: Add kernel IBRS implementation
  • x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS
  • x86/speculation: Add LFENCE to RSB fill sequence
  • KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS
  • x86/speculation: Fill RSB on vmexit for IBRS
  • x86/cpu/amd: Enumerate BTC_NO
  • x86/speculation: Disable RRSBA behavior
  • x86/bugs: Warn when "ibrs" mitigation is selected on Enhanced IBRS parts
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-29901
  • x86/bugs: Optimize SPEC_CTRL MSR writes
  • x86/bugs: Split spectre_v2_select_mitigation() and spectre_v2_user_select_mitigation()
  • x86/bugs: Report Intel retbleed vulnerability
  • entel_idle: Disable IBRS during long idle
  • x86/speculation: Change FILL_RETURN_BUFFER to work with objtool
  • x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n
  • x86/speculation: Fix firmware entry SPEC_CTRL handling
  • x86/speculation: Fix SPEC_CTRL write on SMT state change
  • x86/speculation: Use cached host SPEC_CTRL value for guest entry/exit
  • x86/speculation: Remove x86_spec_ctrl_mask
  • x86/common: Stamp out the stepping madness
  • x86/bugs: Add Cannon lake to RETBleed affected CPU list
  • x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl_current
• Bionic update: upstream stable patchset 2022-12-01 (LP: #1998542) // CVE-2022-29900
  • x86/bugs: Add AMD retbleed= boot parameter
• Bionic update: upstream stable patchset 2022-10-06 (LP: #1992112)
  • x86/bugs: Add "unknown" reporting for MMIO Stale Data
• CVE-2021-26401
  • x86/speculation: Warn about Spectre v2 LFENCE mitigation
  • x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT
• CVE-2022-0001
  • x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
• Bionic update: upstream stable patchset 2019-10-07 (LP: #1847155)
  • x86/cpu: Add Tiger Lake to Intel family
• CVE-url: https://ubuntu.com/security/CVE-2023-4622
  • af_unix: Fix null-ptr-deref in unix_stream_sendpage().
• CVE-url: https://ubuntu.com/security/CVE-2022-45919
  • media: dvb-core: Fix use-after-free due to race condition at dvb_ca_en50221
• Miscellaneous upstream changes
  • Revert "x86/enter: Use IBRS on syscall and interrupts"

This update for xen fixes the following issues:

Update Xen to version 4.14.4 (bsc#1027519)

Transient execution side-channel attacks attacking the Branch History Buffer (BHB), named 'Branch Target Injection' and 'Intra-Mode Branch History Injection' are now mitigated.

Security issues fixed:

• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: BHB speculation issues (bsc#1196915).

Non-security issues fixed:

• Fixed issue around xl and virsh operation - virsh list not giving any output (bsc#1191668).

This update for xen fixes the following issues:

Transient execution side-channel attacks attacking the Branch History Buffer (BHB), named 'Branch Target Injection' and 'Intra-Mode Branch History Injection' are now mitigated.

• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: BHB speculation issues (bsc#1196915).

This update for xen fixes the following issues:

Transient execution side-channel attacks attacking the Branch History Buffer (BHB), named 'Branch Target Injection' and 'Intra-Mode Branch History Injection' are now mitigated.

• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: BHB speculation issues (bsc#1196915).

This update for xen fixes the following issues:

Update Xen to version 4.14.4 (bsc#1027519)

Transient execution side-channel attacks attacking the Branch History Buffer (BHB), named 'Branch Target Injection' and 'Intra-Mode Branch History Injection' are now mitigated.

Security issues fixed:

• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: BHB speculation issues (bsc#1196915).

Non-security issues fixed:

• Fixed issue around xl and virsh operation - virsh list not giving any output (bsc#1191668).

This update for xen fixes the following issues:

• CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423).
• CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425).
• CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426).
• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: Added BHB speculation issue mitigations (bsc#1196915).

This update for xen fixes the following issues:

• CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423).
• CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425).
• CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426).
• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: Added BHB speculation issue mitigations (bsc#1196915).

This update for xen fixes the following issues:

• CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423).
• CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425).
• CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426).
• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: Added BHB speculation issue mitigations (bsc#1196915).

This update for xen fixes the following issues:

• CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423).
• CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425).
• CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426).
• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: Added BHB speculation issue mitigations (bsc#1196915).
• CVE-2021-20257: Fixed an infinite loop in the e1000 emulated device, which could cause an excessive CPU consumption in the host (bsc#1182846).

This update for xen fixes the following issues:

• CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423).
• CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425).
• CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426).
• CVE-2022-0001, CVE-2022-0002, CVE-2021-26401: Added BHB speculation issue mitigations (bsc#1196915).

Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device removal. A privileged or physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-27820)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-1016)

It was discovered that the MMC/SD subsystem in the Linux kernel did not properly handle read errors from SD cards in certain situations. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-20008)

It was discovered that the USB gadget subsystem in the Linux kernel did not properly validate interface descriptor requests. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in the Linux kernel did not properly validate the size of the RNDIS_MSG_SET command. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-25375)

It was discovered that the ST21NFCA NFC driver in the Linux kernel did not properly validate the size of certain data in EVT_TRANSACTION events. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-26490)

It was discovered that the Xilinx USB2 device gadget driver in the Linux kernel did not properly validate endpoint indices from the host. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-27223)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

It was discovered that the MMC/SD subsystem in the Linux kernel did not properly handle read errors from SD cards in certain situations. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-20008)

It was discovered that the USB gadget subsystem in the Linux kernel did not properly validate interface descriptor requests. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in the Linux kernel did not properly validate the size of the RNDIS_MSG_SET command. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-25375)

It was discovered that the ST21NFCA NFC driver in the Linux kernel did not properly validate the size of certain data in EVT_TRANSACTION events. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-26490)

It was discovered that the USB SR9700 ethernet device driver for the Linux kernel did not properly validate the length of requests from the device. A physically proximate attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-26966)

It was discovered that the Xilinx USB2 device gadget driver in the Linux kernel did not properly validate endpoint indices from the host. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-27223)

Miaoqian Lin discovered that the RDMA Transport (RTRS) client implementation in the Linux kernel contained a double-free when handling certain error conditions. An attacker could use this to cause a denial of service (system crash). (CVE-2022-29156)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

Demi Marie Obenour and Simon Gaiser discovered that several Xen para- virtualization device frontends did not properly restrict the access rights of device backends. An attacker could possibly use a malicious Xen backend to gain access to memory pages of a guest VM or cause a denial of service in the guest. (CVE-2022-23036, CVE-2022-23037, CVE-2022-23038, CVE-2022-23039, CVE-2022-23040, CVE-2022-23042)

It was discovered that the USB Gadget file system interface in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-24958)

It was discovered that the USB gadget subsystem in the Linux kernel did not properly validate interface descriptor requests. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-25258)

It was discovered that the Remote NDIS (RNDIS) USB gadget implementation in the Linux kernel did not properly validate the size of the RNDIS_MSG_SET command. An attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-25375)

It was discovered that the ST21NFCA NFC driver in the Linux kernel did not properly validate the size of certain data in EVT_TRANSACTION events. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-26490)

It was discovered that the USB SR9700 ethernet device driver for the Linux kernel did not properly validate the length of requests from the device. A physically proximate attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-26966)

It was discovered that the Xilinx USB2 device gadget driver in the Linux kernel did not properly validate endpoint indices from the host. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-27223)

Xuewei Feng, Chuanpu Fu, Qi Li, Kun Sun, and Ke Xu discovered that the TCP implementation in the Linux kernel did not properly handle IPID assignment. A remote attacker could use this to cause a denial of service (connection termination) or inject forged data. (CVE-2020-36516)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

Jürgen Groß discovered that the Xen subsystem within the Linux kernel did not adequately limit the number of events driver domains (unprivileged PV backends) could send to other guest VMs. An attacker in a driver domain could use this to cause a denial of service in other guest VMs. (CVE-2021-28712, CVE-2021-28713)

Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428)

It was discovered that the IEEE 802.15.4 wireless network subsystem in the Linux kernel did not properly handle certain error conditions, leading to a null pointer dereference vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-3659)

It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

It was discovered that the SCTP protocol implementation in the Linux kernel did not properly verify VTAGs in some situations. A remote attacker could possibly use this to cause a denial of service (connection disassociation). (CVE-2021-3772)

It was discovered that the btrfs file system implementation in the Linux kernel did not properly handle locking in certain error conditions. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2021-4149)

Jann Horn discovered that the socket subsystem in the Linux kernel contained a race condition when handling listen() and connect() operations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2021-4203)

It was discovered that the file system quotas implementation in the Linux kernel did not properly validate the quota block number. An attacker could use this to construct a malicious file system image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2021-45868)

Zhihua Yao discovered that the MOXART SD/MMC driver in the Linux kernel did not properly handle device removal, leading to a use-after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-0487)

It was discovered that the block layer subsystem in the Linux kernel did not properly initialize memory in some situations. A privileged local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-0494)

It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious UDF image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-0617)

David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in some…

Xuewei Feng, Chuanpu Fu, Qi Li, Kun Sun, and Ke Xu discovered that the TCP implementation in the Linux kernel did not properly handle IPID assignment. A remote attacker could use this to cause a denial of service (connection termination) or inject forged data. (CVE-2020-36516)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

Jürgen Groß discovered that the Xen subsystem within the Linux kernel did not adequately limit the number of events driver domains (unprivileged PV backends) could send to other guest VMs. An attacker in a driver domain could use this to cause a denial of service in other guest VMs. (CVE-2021-28712, CVE-2021-28713)

Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428)

It was discovered that the IEEE 802.15.4 wireless network subsystem in the Linux kernel did not properly handle certain error conditions, leading to a null pointer dereference vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-3659)

It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

It was discovered that the SCTP protocol implementation in the Linux kernel did not properly verify VTAGs in some situations. A remote attacker could possibly use this to cause a denial of service (connection disassociation). (CVE-2021-3772)

It was discovered that the btrfs file system implementation in the Linux kernel did not properly handle locking in certain error conditions. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2021-4149)

Jann Horn discovered that the socket subsystem in the Linux kernel contained a race condition when handling listen() and connect() operations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2021-4203)

It was discovered that the file system quotas implementation in the Linux kernel did not properly validate the quota block number. An attacker could use this to construct a malicious file system image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2021-45868)

Zhihua Yao discovered that the MOXART SD/MMC driver in the Linux kernel did not properly handle device removal, leading to a use-after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-0487)

It was discovered that the block layer subsystem in the Linux kernel did not properly initialize memory in some situations. A privileged local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-0494)

It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious UDF image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-0617)

David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in some…

Xuewei Feng, Chuanpu Fu, Qi Li, Kun Sun, and Ke Xu discovered that the TCP implementation in the Linux kernel did not properly handle IPID assignment. A remote attacker could use this to cause a denial of service (connection termination) or inject forged data. (CVE-2020-36516)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk, Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre Variant 2 mitigations for AMD processors on Linux were insufficient in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2021-26401)

Jürgen Groß discovered that the Xen subsystem within the Linux kernel did not adequately limit the number of events driver domains (unprivileged PV backends) could send to other guest VMs. An attacker in a driver domain could use this to cause a denial of service in other guest VMs. (CVE-2021-28711, CVE-2021-28712, CVE-2021-28713)

Wolfgang Frisch discovered that the ext4 file system implementation in the Linux kernel contained an integer overflow when handling metadata inode extents. An attacker could use this to construct a malicious ext4 file system image that, when mounted, could cause a denial of service (system crash). (CVE-2021-3428)

It was discovered that the IEEE 802.15.4 wireless network subsystem in the Linux kernel did not properly handle certain error conditions, leading to a null pointer dereference vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2021-3659)

It was discovered that the System V IPC implementation in the Linux kernel did not properly handle large shared memory counts. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

It was discovered that the SCTP protocol implementation in the Linux kernel did not properly verify VTAGs in some situations. A remote attacker could possibly use this to cause a denial of service (connection disassociation). (CVE-2021-3772)

It was discovered that the btrfs file system implementation in the Linux kernel did not properly handle locking in certain error conditions. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2021-4149)

Jann Horn discovered that the socket subsystem in the Linux kernel contained a race condition when handling listen() and connect() operations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2021-4203)

It was discovered that the file system quotas implementation in the Linux kernel did not properly validate the quota block number. An attacker could use this to construct a malicious file system image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2021-45868)

Zhihua Yao discovered that the MOXART SD/MMC driver in the Linux kernel did not properly handle device removal, leading to a use-after-free vulnerability. A physically proximate attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-0487)

It was discovered that the block layer subsystem in the Linux kernel did not properly initialize memory in some situations. A privileged local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-0494)

It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious UDF image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-0617)

David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in…