{"id":"CVE-2021-4093","aliases":["BELL-CVE-2021-4093","CLSA-2023-1690294029","DEBIAN-CVE-2021-4093","EUVD-2021-33979","GHSA-2vg6-vx3w-m2r4","RHSA-2022:1975","RHSA-2022:1988","RLSA-2022:1988","UBUNTU-CVE-2021-4093","USN-5265-1"],"status":"published","title":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization...","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00419,"percentile":0.36497,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125","CWE-787"],"published":"2021-12-13T00:00:00Z","modified":"2026-10-26T09:30:42Z","fixes":[{"ecosystem":"Debian:12","package":"linux","fixed_in":["5.14.16-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["5.14.16-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["5.14.16-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-aws-5.11","fixed_in":["5.11.0-1028.31~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-aws-5.13","fixed_in":["5.13.0-1012.13~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-azure-5.11","fixed_in":["5.11.0-1028.31~20.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-azure-5.13","fixed_in":["5.13.0-1013.15~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-gcp-5.11","fixed_in":["5.11.0-1029.33~20.04.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-gcp-5.13","fixed_in":["5.13.0-1013.16~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-hwe-5.13","fixed_in":["5.13.0-28.31~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-oem-5.13","fixed_in":["5.13.0-1029.36"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-oem-5.14","fixed_in":["5.14.0-1008.8"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-oracle-5.11","fixed_in":["5.11.0-1028.31~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-oracle-5.13","fixed_in":["5.13.0-1016.20~20.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"bpftool","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-cross-headers","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug-modules","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug-modules-extra","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-debug-modules-internal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-headers","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-ipaclones-internal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-modules","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"source":"osv","ecosystem":"TuxCare:CentOS:8.5","package":"kernel-modules-extra","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-348.7.1.el8_5.tuxcare.els9"}]}],"bundled":29},{"so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flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-18T17:50:37Z","modified":"2024-08-03T17:16:03.525Z","cwes":["CWE-125"],"updated_at":"2026-11-02T14:33:07.697752Z"}],"euvd":[{"id":"EUVD-2021-33979","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-18T17:50:37Z","modified":"2024-08-03T17:16:03Z","updated_at":"2026-11-03T03:25:10.888157Z"}],"ghsa":[{"id":"GHSA-2vg6-vx3w-m2r4","title":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization...","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-19T00:01:29Z","modified":"2023-01-27T05:06:29Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:42:55.562029Z"}],"nvd":[{"id":"CVE-2021-4093","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-18T18:15:10.363Z","modified":"2026-06-17T04:19:01.41Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-125","CWE-787"],"updated_at":"2026-11-02T14:07:04.6896Z"}],"osv":[{"id":"BELL-CVE-2021-4093","title":"CVE-2021-4093 does not affect BellSoft software","status":"withdrawn","published":"2022-02-18T18:15:00Z","modified":"2026-01-26T09:47:32.155093Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:16.5265Z"},{"id":"CVE-2021-4093","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-18T18:15:10.363Z","modified":"2026-03-14T11:10:58.607129Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.249056Z"},{"id":"DEBIAN-CVE-2021-4093","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2022-02-18T18:15:10.363Z","modified":"2026-10-23T18:03:34.096010549Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"RHSA-2022:1975","title":"Red Hat Security Advisory: kernel-rt security and bug fix update","status":"published","published":"2024-09-13T22:48:28Z","modified":"2026-10-15T10:02:33Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:1988","title":"Red Hat Security Advisory: kernel security, bug fix, and enhancement update","status":"published","published":"2024-09-16T06:30:36Z","modified":"2026-10-15T10:02:34Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RLSA-2022:1988","title":"Important: kernel security, bug fix, and enhancement update","description":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)\n\n* kernel: avoid cyclic entity chains due to malformed USB descriptors (CVE-2020-0404)\n\n* kernel: speculation on incompletely validated data on IBM Power9 (CVE-2020-4788)\n\n* kernel: integer overflow in k_ascii() in drivers/tty/vt/keyboard.c (CVE-2020-13974)\n\n* kernel: out-of-bounds read in bpf_skb_change_head() of filter.c due to a use-after-free (CVE-2021-0941)\n\n* kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP() (CVE-2021-3612)\n\n* kernel: reading /proc/sysvipc/shm does not scale with large shared memory segment counts (CVE-2021-3669)\n\n* kernel: out-of-bound Read in qrtr_endpoint_post in net/qrtr/qrtr.c (CVE-2021-3743)\n\n* kernel: crypto: ccp - fix resource leaks in ccp_run_aes_gcm_cmd() (CVE-2021-3744)\n\n* kernel: possible use-after-free in bluetooth module (CVE-2021-3752)\n\n* kernel: unaccounted ipc objects in Linux kernel lead to breaking memcg limits and DoS attacks (CVE-2021-3759)\n\n* kernel: DoS in ccp_run_aes_gcm_cmd() function (CVE-2021-3764)\n\n* kernel: sctp: Invalid chunks may be used to remotely remove existing associations (CVE-2021-3772)\n\n* kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clients (CVE-2021-3773)\n\n* kernel: possible leak or coruption of data residing on hugetlbfs (CVE-2021-4002)\n\n* kernel: security regression for CVE-2018-13405 (CVE-2021-4037)\n\n* kernel: Buffer overwrite in decode_nfs_fh function (CVE-2021-4157)\n\n* kernel: cgroup: Use open-time creds and namespace for migration perm checks (CVE-2021-4197)\n\n* kernel: Race condition in races in sk_peer_pid and sk_peer_cred accesses (CVE-2021-4203)\n\n* kernel: new DNS Cache Poisoning Attack based on ICMP fragment needed packets replies (CVE-2021-20322)\n\n* kernel: arm: SIGPAGE information disclosure vulnerability (CVE-2021-21781)\n\n* hw: cpu: LFENCE/JMP Mitigation Update for CVE-2017-5715 (CVE-2021-26401)\n\n* kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)\n\n* kernel: use-after-free in hso_free_net_device() in drivers/net/usb/hso.c (CVE-2021-37159)\n\n* kernel: eBPF multiplication integer overflow in prealloc_elems_and_freelist() in kernel/bpf/stackmap.c leads to out-of-bounds write (CVE-2021-41864)\n\n* kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)\n\n* kernel: ppc: kvm: allows a malicious KVM guest to crash the host (CVE-2021-43056)\n\n* kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c (CVE-2021-43389)\n\n* 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)\n\n* kernel: use-after-free in the TEE subsystem (CVE-2021-44733)\n\n* kernel: information leak in the IPv6 implementation (CVE-2021-45485)\n\n* kernel: information leak in the IPv4 implementation (CVE-2021-45486)\n\n* hw: cpu: intel: Branch History Injection (BHI) (CVE-2022-0001)\n\n* hw: cpu: intel: Intra-Mode BTI (CVE-2022-0002)\n\n* kernel: Local denial of service in bond_ipsec_add_sa (CVE-2022-0286)\n\n* kernel: DoS in sctp_addto_chunk in net/sctp/sm_make_chunk.c (CVE-2022-0322)\n\n* kernel: FUSE allows UAF reads of write() buffers, allowing theft of (partial) /etc/shadow hashes (CVE-2022-1011)\n\n* kernel: use-after-free in nouveau kernel module (CVE-2020-27820)\n\nFor 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.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.","status":"published","published":"2022-05-10T08:11:36Z","modified":"2026-02-04T07:40:20.835744Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"UBUNTU-CVE-2021-4093","description":"A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.","status":"published","published":"2021-12-13T00:00:00Z","modified":"2026-02-04T02:23:29.59421Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"CLSA-2023-1690294029","title":"kernel: Fix of 30 CVEs","description":"- ALSA: pcm: Fix races among concurrent prealloc proc writes {CVE-2022-1048}\n- ALSA: pcm: Fix races among concurrent prepare and hw_params/hw_free calls {CVE-2022-1048}\n- ALSA: pcm: Fix races among concurrent read/write and buffer changes {CVE-2022-1048}\n- ALSA: pcm: Fix races among concurrent hw_params and hw_free calls {CVE-2022-1048}\n- x86/elf: Disable automatic READ_IMPLIES_EXEC on 64-bit {CVE-2022-25265}\n- x86/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK {CVE-2022-25265}\n- x86/elf: Add table to document READ_IMPLIES_EXEC {CVE-2022-25265}\n- KVM: SEV-ES: fix another issue with string I/O VMGEXITs {CVE-2021-4093}\n- KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if needed {CVE-2021-4093}\n- KVM: SEV-ES: keep INS functions together {CVE-2021-4093}\n- KVM: x86: remove unnecessary arguments from complete_emulator_pio_in {CVE-2021-4093}\n- KVM: x86: split the two parts of emulator_pio_in {CVE-2021-4093}\n- KVM: x86: leave vcpu-\u003earch.pio.count alone in emulator_pio_in_out {CVE-2021-4093}\n- KVM: SEV-ES: clean up kvm_sev_es_ins/outs {CVE-2021-4093}\n- KVM: SEV-ES: rename guest_ins_data to sev_pio_data {CVE-2021-4093}\n- KVM: SEV-ES: fix length of string I/O {CVE-2021-4093}\n- drm/i915: fix TLB invalidation for Gen12 video and compute engines {CVE-2022-4139}\n- drm/i915: Flush TLBs before releasing backing store {CVE-2022-0330}\n- xfs: fix up non-directory creation in SGID directories {CVE-2021-4037}\n- tcp: Fix data races around icsk-\u003eicsk_af_ops. {CVE-2022-3566}\n- ipv6: Fix data races around sk-\u003esk_prot. {CVE-2022-3567}\n- ipv6: annotate some data-races around sk-\u003esk_prot {CVE-2022-3567}\n- ipv6: use indirect call wrappers for {tcp, udpv6}_{recv, send}msg() {CVE-2022-3567}\n- netfilter: nf_tables: deactivate anonymous set from preparation phase {CVE-2023-32233}\n- netfilter: nf_tables: bogus EBUSY when deleting set after flush\n- media: dmxdev: fix UAF when dvb_register_device() fails {CVE-2022-41218}\n- l2tp: Don't sleep and disable BH under writer-side sk_callback_lock {CVE-2022-4129}\n- l2tp: Serialize access to sk_user_data with sk_callback_lock {CVE-2022-4129}\n- net: fix a concurrency bug in l2tp_tunnel_register() {CVE-2022-4129}\n- Bluetooth: L2CAP: Fix memory leak in vhci_write {CVE-2022-3619}\n- Bluetooth: L2CAP: Fix handling fragmented length\n- wifi: brcmfmac: Fix potential buffer overflow in brcmf_fweh_event_worker() {CVE-2022-3628}\n- wifi: cfg80211: avoid nontransmitted BSS list corruption {CVE-2022-42721}\n- cfg80211: scan: fix RCU in cfg80211_add_nontrans_list()\n- wifi: cfg80211: fix BSS refcounting bugs {CVE-2022-42720}\n- cfg80211: hold bss_lock while updating nontrans_list\n- ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF {CVE-2023-0266}\n- ALSA: control: Drop superfluous snd_power_wait() calls\n- ALSA: control: Track in-flight control read/write/tlv accesses\n- Bluetooth: L2CAP: Fix use-after-free caused by l2cap_reassemble_sdu {CVE-2022-3564}\n- netfilter: nf_conntrack_irc: Tighten matching on DCC message {CVE-2022-2663}\n- netfilter: nf_conntrack_irc: Fix forged IP logic {CVE-2022-2663}\n- KVM: x86: Avoid theoretical NULL pointer dereference in kvm_irq_delivery_to_apic_fast() {CVE-2022-2153}\n- KVM: Add infrastructure and macro to mark VM as bugged\n- KVM: x86/mmu: fix NULL pointer dereference on guest INVPCID {CVE-2022-1789}\n- tcp/udp: Fix memory leak in ipv6_renew_options(). {CVE-2022-3524}\n- proc: proc_skip_spaces() shouldn't think it is working on C strings {CVE-2022-4378}\n- proc: avoid integer type confusion in get_proc_long {CVE-2022-4378}\n- wifi: mac80211: fix crash in beacon protection for P2P-device {CVE-2022-42722}\n- net: sched: cbq: dont intepret cls results when asked to drop {CVE-2023-23454}\n- ipv6: raw: Deduct extension header length in rawv6_push_pending_frames {CVE-2023-0394}\n- net: sched: disallow noqueue for qdisc classes {CVE-2022-47929}\n- wifi: cfg80211: fix u8 overflow in cfg80211_update_notlisted_nontrans() {CVE-2022-41674}\n- af_key: Do not call xfrm_probe_algs in parallel {CVE-2022-3028}\n- dm verity: set DM_TARGET_IMMUTABLE feature flag {CVE-2022-20572}","status":"published","published":"2026-10-18T09:59:36Z","modified":"2026-10-26T09:30:42.851120374Z","updated_at":"2026-11-02T15:43:40.509998Z"},{"id":"USN-5265-1","title":"linux, linux-aws, linux-aws-5.11, linux-aws-5.13, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.13, linux-kvm, linux-oem-5.13, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities","description":"Jeremy Cline discovered a use-after-free in the nouveau graphics driver of\nthe Linux kernel during device removal. A privileged or physically\nproximate attacker could use this to cause a denial of service (system\ncrash). (CVE-2020-27820)\n\nIt was discovered that the Bluetooth subsystem in the Linux kernel\ncontained a use-after-free vulnerability. A local attacker could use this\nto cause a denial of service (system crash) or possibly execute arbitrary\ncode. (CVE-2021-3640)\n\nLikang Luo discovered that a race condition existed in the Bluetooth\nsubsystem of the Linux kernel, leading to a use-after-free vulnerability. A\nlocal attacker could use this to cause a denial of service (system crash)\nor possibly execute arbitrary code. (CVE-2021-3752)\n\nIt was discovered that the SCTP protocol implementation in the Linux kernel\ndid not properly verify VTAGs in some situations. A remote attacker could\npossibly use this to cause a denial of service (connection disassociation).\n(CVE-2021-3772)\n\nIt was discovered that the eBPF implementation in the Linux kernel\ncontained a race condition around read-only maps. A privileged attacker\ncould use this to modify read-only maps. (CVE-2021-4001)\n\nIt was discovered that the NFS server implementation in the Linux kernel\ncontained an out-of-bounds write vulnerability. A local attacker could use\nthis to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2021-4090)\n\nFelix Wilhelm discovered that the KVM implementation in the Linux kernel\ndid not properly handle exit events from AMD Secure Encrypted\nVirtualization-Encrypted State (SEV-ES) guest VMs. An attacker in a guest\nVM could use this to cause a denial of service (host kernel crash) or\npossibly execute arbitrary code in the host kernel. (CVE-2021-4093)\n\nLin Ma discovered that the NFC Controller Interface (NCI) implementation in\nthe Linux kernel contained a race condition, leading to a use-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly execute arbitrary code. (CVE-2021-4202)\n\nIt was discovered that the AMD Radeon GPU driver in the Linux kernel did\nnot properly validate writes in the debugfs file system. A privileged\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-42327)\n\nLuo Likang discovered that the FireDTV Firewire driver in the Linux kernel\ndid not properly perform bounds checking in some situations. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-42739)\n","status":"published","published":"2022-02-03T05:40:51Z","modified":"2026-09-10T11:00:29.975906324Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}