CVE-2022-48989

In the Linux kernel, the following vulnerability has been resolved: fscache: Fix oops due to race with cookie_lru and use_cookie If a cookie expires from the LRU and the LRU_DISCARD flag is set, but the state machine has not run yet, it's possible another thread can call fscache_use_cookie and begin to use it. When the cookie_worker finally runs, it will see the LRU_DISCARD flag set, transition the cookie->state to LRU_DISCARDING, which will then withdraw the cookie. Once the cookie is withdrawn the object is removed the below oops will occur because the object associated with the cookie is now NULL. Fix the oops by clearing the LRU_DISCARD bit if another thread uses the cookie before the cookie_worker runs. BUG: kernel NULL pointer dereference, address: 0000000000000008 ... CPU: 31 PID: 44773 Comm: kworker/u130:1 Tainted: G E 6.0.0-5.dneg.x86_64 #1 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: events_unbound netfs_rreq_write_to_cache_work [netfs] RIP: 0010:cachefiles_prepare_write+0x28/0x90 [cachefiles] ... Call Trace: netfs_rreq_write_to_cache_work+0x11c/0x320 [netfs] process_one_work+0x217/0x3e0 worker_thread+0x4a/0x3b0 kthread+0xd6/0x100

• atm: lec: fix use-after-free in sock_def_readable() {CVE-2026-43050}
• ALSA: usb-audio: Use the right limit for PCM OOB check
• ALSA: usb-audio: Prevent excessive number of frames {CVE-2026-23208}
• xen/privcmd: fix double free via VMA splitting {CVE-2026-31787}
• cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path {CVE-2026-43328}
• cpufreq: governor: Free dbs_data directly when gov->init() fails {CVE-2026-43328}
• rcu: Fix rcu_read_unlock() deadloop due to softirq
• rcu: Fix racy re-initialization of irq_work causing hangs
• RDMA/efa: Fix possible deadlock {CVE-2026-31493}
• RDMA/efa: Fix use of completion ctx after free {CVE-2026-31493}
• RDMA/efa: Improve admin completion context state machine {CVE-2026-31493}
• RDMA/efa: Check stored completion CTX command ID with received one {CVE-2026-31493}
• RDMA/efa: Extend admin timeout error print
• RDMA/efa: Properly handle unexpected AQ completions {CVE-2026-31493}
• rcu: Fix rcu_read_unlock() deadloop due to IRQ work {CVE-2025-39744}
• netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() {CVE-2026-23455}
• rtnetlink: Allocate vfinfo size for VF GUIDs when supported {CVE-2025-22075}
• kernel/printk/index.c: fix memory leak with using debugfs_lookup() {CVE-2023-53402}
• wifi: iwlwifi: don't warn when if there is a FW error {CVE-2025-38096}
• md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid() {CVE-2023-53210}
• exfat: fix the infinite loop in exfat_readdir() {CVE-2024-57940}
• af_netlink: Fix shift out of bounds in group mask calculation {CVE-2022-49197}
• xfrm_user: fix info leak in build_mapping() {CVE-2026-43089}
• udf: Fix preallocation discarding at indirect extent boundary {CVE-2022-48946}
• efi: Do not import certificates from UEFI Secure Boot for T2 Macs {CVE-2022-49357}
• kernel/resource: fix kfree() of bootmem memory again {CVE-2022-49190}
• smb: client: fix warning in cifs_smb3_do_mount() {CVE-2023-53230}
• sctp: Fix null-ptr-deref in reuseport_add_sock(). {CVE-2024-44935}
• RDMA/bnxt_re: Fix a bug while setting up Level-2 PBL pages {CVE-2024-50208}
• drm/amdgpu: avoid using null object of framebuffer {CVE-2024-41093}
• firmware: cs_dsp: Return error if block header overflows file {CVE-2024-42238}
• ata: libata-sff: Ensure that we cannot write outside the allocated buffer {CVE-2025-21738}
• net: hinic: fix memory leak when reading function table {CVE-2022-50438}
• device property: fix of node refcount leak in fwnode_graph_get_next_endpoint() {CVE-2022-49752}
• libceph: fix race between delayed_work() and ceph_monc_stop() {CVE-2024-42232}
• usbnet: fix memory leak in error case {CVE-2022-49657}
• hwmon: (w83791d) Convert macros to functions to avoid TOCTOU {CVE-2025-71111}
• seccomp: Move copy_seccomp() to no failure path. {CVE-2022-50661}
• net/mlx5: fs, lock FTE when checking if active {CVE-2024-53121}
• nvme-pci: fix freeing of the HMB descriptor table {CVE-2024-56756}
• leds: class: Protect brightness_show() with led_cdev->led_access mutex {CVE-2024-56587}
• bpf, sockmap: Check for any of tcp_bpf_prots when cloning a listener {CVE-2023-52986}
• RDMA/uverbs: Prevent integer overflow issue {CVE-2024-57890}
• sctp: move SCTP_CMD_ASSOC_SHKEY right after SCTP_CMD_PEER_INIT {CVE-2026-23125}
• tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event() {CVE-2022-49800}
• kprobes: Fix check for probe enabled in kill_kprobe() {CVE-2022-50266}
• NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102 {CVE-2024-26870}
• i915/perf: Fix NULL deref bugs with drm_dbg() calls {CVE-2023-52788}
• can: mcp251x: fix deadlock in error path of mcp251x_open {CVE-2026-23357}
• regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode {CVE-2022-50558}
• wifi: cfg80211: Set correct chandef when starting CAC {CVE-2024-49937}
• netfilter: nf_tables: prevent nf_skb_duplicated corruption {CVE-2024-49952}
• can: isotp: fix potential CAN frame reception race in isotp_rcv() {CVE-2022-48830}
• bpf: Fix…

In the Linux kernel, the following vulnerability has been resolved: fscache: Fix oops due to race with cookie_lru and use_cookie If a cookie expires from the LRU and the LRU_DISCARD flag is set, but the state machine has not run yet, it's possible another thread can call fscache_use_cookie and begin to use it. When the cookie_worker finally runs, it will see the LRU_DISCARD flag set, transition the cookie->state to LRU_DISCARDING, which will then withdraw the cookie. Once the cookie is withdrawn the object is removed the below oops will occur because the object associated with the cookie is now NULL. Fix the oops by clearing the LRU_DISCARD bit if another thread uses the cookie before the cookie_worker runs. BUG: kernel NULL pointer dereference, address: 0000000000000008 ... CPU: 31 PID: 44773 Comm: kworker/u130:1 Tainted: G E 6.0.0-5.dneg.x86_64 #1 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: events_unbound netfs_rreq_write_to_cache_work [netfs] RIP: 0010:cachefiles_prepare_write+0x28/0x90 [cachefiles] ... Call Trace: netfs_rreq_write_to_cache_work+0x11c/0x320 [netfs] process_one_work+0x217/0x3e0 worker_thread+0x4a/0x3b0 kthread+0xd6/0x100

The SUSE Linux Enterprise 15 SP5 RT kernel was updated to receive various security bugfixes.

The following security bugs were fixed:

• CVE-2021-47594: mptcp: never allow the PM to close a listener subflow (bsc#1226560).
• CVE-2022-48983: io_uring: Fix a null-ptr-deref in io_tctx_exit_cb() (bsc#1231959).
• CVE-2024-26782: mptcp: fix double-free on socket dismantle (bsc#1222590).
• CVE-2024-26906: Fixed invalid vsyscall page read for copy_from_kernel_nofault() (bsc#1223202).
• CVE-2024-26953: net: esp: fix bad handling of pages from page_pool (bsc#1223656).
• CVE-2024-35888: erspan: make sure erspan_base_hdr is present in skb->head (bsc#1224518).
• CVE-2024-35937: wifi: cfg80211: check A-MSDU format more carefully (bsc#1224526).
• CVE-2024-36883: net: fix out-of-bounds access in ops_init (bsc#1225725).
• CVE-2024-36886: tipc: fix UAF in error path (bsc#1225730).
• CVE-2024-36905: tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets (bsc#1225742).
• CVE-2024-36954: tipc: fix a possible memleak in tipc_buf_append (bsc#1225764).
• CVE-2024-38589: netrom: fix possible dead-lock in nr_rt_ioctl() (bsc#1226748).
• CVE-2024-38615: cpufreq: exit() callback is optional (bsc#1226592).
• CVE-2024-40997: cpufreq: amd-pstate: fix memory leak on CPU EPP exit (bsc#1227853).
• CVE-2024-41023: sched/deadline: Fix task_struct reference leak (bsc#1228430).
• CVE-2024-44932: idpf: fix UAFs when destroying the queues (bsc#1229808).
• CVE-2024-44964: idpf: fix memory leaks and crashes while performing a soft reset (bsc#1230220).
• CVE-2024-44995: net: hns3: fix a deadlock problem when config TC during resetting (bsc#1230231).
• CVE-2024-46681: pktgen: use cpus_read_lock() in pg_net_init() (bsc#1230558).
• CVE-2024-46800: sch/netem: fix use after free in netem_dequeue (bsc#1230827).
• CVE-2024-47679: vfs: fix race between evice_inodes() and find_inode()&iput() (bsc#1231930).
• CVE-2024-47701: ext4: avoid OOB when system.data xattr changes underneath the filesystem (bsc#1231920).
• CVE-2024-47745: mm: call the security_mmap_file() LSM hook in remap_file_pages() (bsc#1232135).
• CVE-2024-47757: nilfs2: fix potential oob read in nilfs_btree_check_delete() (bsc#1232187).
• CVE-2024-49868: btrfs: fix a NULL pointer dereference when failed to start a new trasacntion (bsc#1232272).
• CVE-2024-49921: drm/amd/display: Check null pointers before used (bsc#1232371).
• CVE-2024-49925: fbdev: efifb: Register sysfs groups through driver core (bsc#1232224)
• CVE-2024-49934: fs/inode: Prevent dump_mapping() accessing invalid dentry.d_name.name (bsc#1232387).
• CVE-2024-49945: net/ncsi: Disable the ncsi work before freeing the associated structure (bsc#1232165).
• CVE-2024-49950: Bluetooth: L2CAP: Fix uaf in l2cap_connect (bsc#1232159).
• CVE-2024-49968: ext4: filesystems without casefold feature cannot be mounted with siphash (bsc#1232264).
• CVE-2024-49983: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free (bsc#1232096).
• CVE-2024-49989: drm/amd/display: fix double free issue during amdgpu module unload (bsc#1232483).
• CVE-2024-50009: cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value (bsc#1232318).
• CVE-2024-50073: tty: n_gsm: Fix use-after-free in gsm_cleanup_mux (bsc#1232520).
• CVE-2024-50082: blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race (bsc#1232500).
• CVE-2024-50089: unicode: Do not special case ignorable code points (bsc#1232860).
• CVE-2024-50093: thermal: intel: int340x: processor: Fix warning during module unload (bsc#1232877).
• CVE-2024-50098: scsi: ufs: core: Set SDEV_OFFLINE when UFS is shut down (bsc#1232881).
• CVE-2024-50108: drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too (bsc#1232884).
• CVE-2024-50110: xfrm: fix one more kernel-infoleak in algo dumping (bsc#1232885).
• CVE-2024-50115: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory (bsc#1232919).
• CVE-2024-50125: Bluetooth: SCO: Fix UAF on sco_sock_timeout (bsc#1232928).
• CVE-2024-50127: net: sched: fix…

The SUSE Linux Enterprise 15 SP5 kernel was updated to receive various security bugfixes.

The following security bugs were fixed:

• CVE-2021-47594: mptcp: never allow the PM to close a listener subflow (bsc#1226560).
• CVE-2022-48879: efi: fix NULL-deref in init error path (bsc#1229556).
• CVE-2022-48956: ipv6: avoid use-after-free in ip6_fragment() (bsc#1231893).
• CVE-2022-48957: dpaa2-switch: Fix memory leak in dpaa2_switch_acl_entry_add() and dpaa2_switch_acl_entry_remove() (bsc#1231973).
• CVE-2022-48958: ethernet: aeroflex: fix potential skb leak in greth_init_rings() (bsc#1231889).
• CVE-2022-48959: net: dsa: sja1105: fix memory leak in sja1105_setup_devlink_regions() (bsc#1231976).
• CVE-2022-48960: net: hisilicon: Fix potential use-after-free in hix5hd2_rx() (bsc#1231979).
• CVE-2022-48962: net: hisilicon: Fix potential use-after-free in hisi_femac_rx() (bsc#1232286).
• CVE-2022-48966: net: mvneta: Fix an out of bounds check (bsc#1232191).
• CVE-2022-48980: net: dsa: sja1105: avoid out of bounds access in sja1105_init_l2_policing() (bsc#1232233).
• CVE-2022-48983: io_uring: Fix a null-ptr-deref in io_tctx_exit_cb() (bsc#1231959).
• CVE-2022-48991: mm/khugepaged: fix collapse_pte_mapped_thp() to allow anon_vma (bsc#1232070).
• CVE-2022-49015: net: hsr: Fix potential use-after-free (bsc#1231938).
• CVE-2022-49017: tipc: re-fetch skb cb after tipc_msg_validate (bsc#1232004).
• CVE-2022-49020: net/9p: Fix a potential socket leak in p9_socket_open (bsc#1232175).
• CVE-2024-26782: mptcp: fix double-free on socket dismantle (bsc#1222590).
• CVE-2024-26906: Fixed invalid vsyscall page read for copy_from_kernel_nofault() (bsc#1223202).
• CVE-2024-26953: net: esp: fix bad handling of pages from page_pool (bsc#1223656).
• CVE-2024-35888: erspan: make sure erspan_base_hdr is present in skb->head (bsc#1224518).
• CVE-2024-35937: wifi: cfg80211: check A-MSDU format more carefully (bsc#1224526).
• CVE-2024-36244: net/sched: taprio: extend minimum interval restriction to entire cycle too (bsc#1226797).
• CVE-2024-36883: net: fix out-of-bounds access in ops_init (bsc#1225725).
• CVE-2024-36886: tipc: fix UAF in error path (bsc#1225730).
• CVE-2024-36905: tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets (bsc#1225742).
• CVE-2024-36954: tipc: fix a possible memleak in tipc_buf_append (bsc#1225764).
• CVE-2024-36957: octeontx2-af: avoid off-by-one read from userspace (bsc#1225762).
• CVE-2024-38589: netrom: fix possible dead-lock in nr_rt_ioctl() (bsc#1226748).
• CVE-2024-38615: cpufreq: exit() callback is optional (bsc#1226592).
• CVE-2024-39476: md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING (bsc#1227437).
• CVE-2024-40965: i2c: lpi2c: Avoid calling clk_get_rate during transfer (bsc#1227885).
• CVE-2024-40997: cpufreq: amd-pstate: fix memory leak on CPU EPP exit (bsc#1227853).
• CVE-2024-41023: sched/deadline: Fix task_struct reference leak (bsc#1228430).
• CVE-2024-42226: Prevent potential failure in handle_tx_event() for Transfer events without TRB (bsc#1228709).
• CVE-2024-42253: gpio: pca953x: fix pca953x_irq_bus_sync_unlock race (bsc#1229005).
• CVE-2024-44931: gpio: prevent potential speculation leaks in gpio_device_get_desc() (bsc#1229837).
• CVE-2024-44932: idpf: fix UAFs when destroying the queues (bsc#1229808).
• CVE-2024-44958: sched/smt: Fix unbalance sched_smt_present dec/inc (bsc#1230179).
• CVE-2024-44964: idpf: fix memory leaks and crashes while performing a soft reset (bsc#1230220).
• CVE-2024-44995: net: hns3: fix a deadlock problem when config TC during resetting (bsc#1230231).
• CVE-2024-45016: netem: fix return value if duplicate enqueue fails (bsc#1230429).
• CVE-2024-45025: fix bitmap corruption on close_range() with CLOSE_RANGE_UNSHARE (bsc#1230456).
• CVE-2024-46678: bonding: change ipsec_lock from spin lock to mutex (bsc#1230550).
• CVE-2024-46681: pktgen: use cpus_read_lock() in pg_net_init() (bsc#1230558).
• CVE-2024-46716: dmaengine: altera-msgdma:…

The SUSE Linux Enterprise 15 SP5 Azure kernel was updated to receive various security bugfixes.

The following security bugs were fixed:

• CVE-2021-47594: mptcp: never allow the PM to close a listener subflow (bsc#1226560).
• CVE-2022-48983: io_uring: Fix a null-ptr-deref in io_tctx_exit_cb() (bsc#1231959).
• CVE-2024-26782: mptcp: fix double-free on socket dismantle (bsc#1222590).
• CVE-2024-26906: Fixed invalid vsyscall page read for copy_from_kernel_nofault() (bsc#1223202).
• CVE-2024-26953: net: esp: fix bad handling of pages from page_pool (bsc#1223656).
• CVE-2024-35888: erspan: make sure erspan_base_hdr is present in skb->head (bsc#1224518).
• CVE-2024-35937: wifi: cfg80211: check A-MSDU format more carefully (bsc#1224526).
• CVE-2024-36883: net: fix out-of-bounds access in ops_init (bsc#1225725).
• CVE-2024-36886: tipc: fix UAF in error path (bsc#1225730).
• CVE-2024-36905: tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets (bsc#1225742).
• CVE-2024-36954: tipc: fix a possible memleak in tipc_buf_append (bsc#1225764).
• CVE-2024-38589: netrom: fix possible dead-lock in nr_rt_ioctl() (bsc#1226748).
• CVE-2024-38615: cpufreq: exit() callback is optional (bsc#1226592).
• CVE-2024-40997: cpufreq: amd-pstate: fix memory leak on CPU EPP exit (bsc#1227853).
• CVE-2024-41023: sched/deadline: Fix task_struct reference leak (bsc#1228430).
• CVE-2024-44932: idpf: fix UAFs when destroying the queues (bsc#1229808).
• CVE-2024-44964: idpf: fix memory leaks and crashes while performing a soft reset (bsc#1230220).
• CVE-2024-44995: net: hns3: fix a deadlock problem when config TC during resetting (bsc#1230231).
• CVE-2024-46681: pktgen: use cpus_read_lock() in pg_net_init() (bsc#1230558).
• CVE-2024-46800: sch/netem: fix use after free in netem_dequeue (bsc#1230827).
• CVE-2024-47679: vfs: fix race between evice_inodes() and find_inode()&iput() (bsc#1231930).
• CVE-2024-47701: ext4: explicitly exit when ext4_find_inline_entry returns an error (bsc#1231920).
• CVE-2024-47745: mm: split critical region in remap_file_pages() and invoke LSMs in between (bsc#1232135).
• CVE-2024-47757: nilfs2: fix potential oob read in nilfs_btree_check_delete() (bsc#1232187).
• CVE-2024-49868: btrfs: fix a NULL pointer dereference when failed to start a new trasacntion (bsc#1232272).
• CVE-2024-49921: drm/amd/display: Check null pointers before used (bsc#1232371).
• CVE-2024-49925: fbdev: efifb: Register sysfs groups through driver core (bsc#1232224)
• CVE-2024-49934: fs/inode: Prevent dump_mapping() accessing invalid dentry.d_name.name (bsc#1232387).
• CVE-2024-49945: net/ncsi: Disable the ncsi work before freeing the associated structure (bsc#1232165).
• CVE-2024-49950: Bluetooth: L2CAP: Fix uaf in l2cap_connect (bsc#1232159).
• CVE-2024-49968: ext4: fix error message when rejecting the default hash (bsc#1232264).
• CVE-2024-49983: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free (bsc#1232096).
• CVE-2024-49989: drm/amd/display: fix double free issue during amdgpu module unload (bsc#1232483).
• CVE-2024-50009: cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value (bsc#1232318).
• CVE-2024-50073: tty: n_gsm: Fix use-after-free in gsm_cleanup_mux (bsc#1232520).
• CVE-2024-50082: blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race (bsc#1232500).
• CVE-2024-50089: unicode: Do not special case ignorable code points (bsc#1232860).
• CVE-2024-50093: thermal: intel: int340x: processor: Fix warning during module unload (bsc#1232877).
• CVE-2024-50098: scsi: ufs: core: Set SDEV_OFFLINE when UFS is shut down (bsc#1232881).
• CVE-2024-50108: drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too (bsc#1232884).
• CVE-2024-50110: xfrm: fix one more kernel-infoleak in algo dumping (bsc#1232885).
• CVE-2024-50115: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory (bsc#1232919).
• CVE-2024-50125: Bluetooth: SCO: Fix UAF on sco_sock_timeout (bsc#1232928).
• CVE-2024-50127: net: sched: fix…