CVE-2022-50300

The Linux Kernel, the operating system core itself.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix extent map use-after-free when handling missing device in read_one_chunk

Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free.

The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721(CVE-2022-50300)

In the Linux kernel, the following vulnerability has been resolved:

parisc: Fix locking in pdc_iodc_print() firmware call

Utilize pdc_lock spinlock to protect parallel modifications of the iodc_dbuf[] buffer, check length to prevent buffer overflow of iodc_dbuf[], drop the iodc_retbuf[] buffer and fix some wrong indentings.(CVE-2022-50518)

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: Add length check in indx_get_root

This adds a length check to guarantee the retrieved index root is legit.

[ 162.459513] BUG: KASAN: use-after-free in hdr_find_e.isra.0+0x10c/0x320 [ 162.460176] Read of size 2 at addr ffff8880037bca99 by task mount/243 [ 162.460851] [ 162.461252] CPU: 0 PID: 243 Comm: mount Not tainted 6.0.0-rc7 #42 [ 162.461744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 162.462609] Call Trace: [ 162.462954] <TASK> [ 162.463276] dump_stack_lvl+0x49/0x63 [ 162.463822] print_report.cold+0xf5/0x689 [ 162.464608] ? unwind_get_return_address+0x3a/0x60 [ 162.465766] ? hdr_find_e.isra.0+0x10c/0x320 [ 162.466975] kasan_report+0xa7/0x130 [ 162.467506] ? _raw_spin_lock_irq+0xc0/0xf0 [ 162.467998] ? hdr_find_e.isra.0+0x10c/0x320 [ 162.468536] __asan_load2+0x68/0x90 [ 162.468923] hdr_find_e.isra.0+0x10c/0x320 [ 162.469282] ? cmp_uints+0xe0/0xe0 [ 162.469557] ? cmp_sdh+0x90/0x90 [ 162.469864] ? ni_find_attr+0x214/0x300 [ 162.470217] ? ni_load_mi+0x80/0x80 [ 162.470479] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.470931] ? ntfs_bread_run+0x190/0x190 [ 162.471307] ? indx_get_root+0xe4/0x190 [ 162.471556] ? indx_get_root+0x140/0x190 [ 162.471833] ? indx_init+0x1e0/0x1e0 [ 162.472069] ? fnd_clear+0x115/0x140 [ 162.472363] ? _raw_spin_lock_irqsave+0x100/0x100 [ 162.472731] indx_find+0x184/0x470 [ 162.473461] ? sysvec_apic_timer_interrupt+0x57/0xc0 [ 162.474429] ? indx_find_buffer+0x2d0/0x2d0 [ 162.474704] ? do_syscall_64+0x3b/0x90 [ 162.474962] dir_search_u+0x196/0x2f0 [ 162.475381] ? ntfs_nls_to_utf16+0x450/0x450 [ 162.475661] ? ntfs_security_init+0x3d6/0x440 [ 162.475906] ? is_sd_valid+0x180/0x180 [ 162.476191] ntfs_extend_init+0x13f/0x2c0 [ 162.476496] ? ntfs_fix_post_read+0x130/0x130 [ 162.476861] ? iput.part.0+0x286/0x320 [ 162.477325] ntfs_fill_super+0x11e0/0x1b50 [ 162.477709] ? put_ntfs+0x1d0/0x1d0 [ 162.477970] ? vsprintf+0x20/0x20 [ 162.478258] ? set_blocksize+0x95/0x150 [ 162.478538] get_tree_bdev+0x232/0x370 [ 162.478789] ? put_ntfs+0x1d0/0x1d0 [ 162.479038] ntfs_fs_get_tree+0x15/0x20 [ 162.479374] vfs_get_tree+0x4c/0x130 [ 162.479729] path_mount+0x654/0xfe0 [ 162.480124] ? putname+0x80/0xa0 [ 162.480484] ? finish_automount+0x2e0/0x2e0 [ 162.480894] ? putname+0x80/0xa0 [ 162.481467] ? kmem_cache_free+0x1c4/0x440 [ 162.482280] ? putname+0x80/0xa0 [ 162.482714] do_mount+0xd6/0xf0 [ 162.483264] ? path_mount+0xfe0/0xfe0 [ 162.484782] ? __kasan_check_write+0x14/0x20 [ 162.485593] __x64_sys_mount+0xca/0x110 [ 162.486024] do_syscall_64+0x3b/0x90 [ 162.486543] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 162.487141] RIP: 0033:0x7f9d374e948a [ 162.488324] Code: 48 8b 0d 11 fa 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 008 [ 162.489728] RSP:…

Root has patched CVE-2022-50300 in the linux package for Root:Debian:11. Multiple fixed versions available.

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix extent map use-after-free when handling missing device in read_one_chunk Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free. The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721

• CVE-2026-46113
  • KVM: x86: Fix shadow paging use-after-free due to unexpected GFN/role {CVE-2026-46113}
• CVE-2022-50300
  • btrfs: fix extent map use-after-free when handling missing device in read_one_chunk {CVE-2022-50300}
• CVE-2022-50082
  • ext4: fix warning in ext4_iomap_begin as race between bmap and write {CVE-2022-50082}
• CVE-2026-43052
  • wifi: mac80211: check tdls flag in ieee80211_tdls_oper {CVE-2026-43052}
• CVE-2026-43386
  • staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie {CVE-2026-43386}
• CVE-2026-23281
  • wifi: libertas: fix use-after-free in lbs_free_adapter() {CVE-2026-23281}
• CVE-2026-43141
  • ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut {CVE-2026-43141}
• CVE-2026-23209
  • macvlan: fix error recovery in macvlan_common_newlink() {CVE-2026-23209}
• CVE-2026-23001
  • macvlan: fix possible UAF in macvlan_forward_source() {CVE-2026-23001}
• CVE-2026-31532
  • can: raw: fix ro->uniq use-after-free in raw_rcv() {CVE-2026-31532}
• CVE-2026-31688
  • driver core: enforce device_lock for driver_match_device() {CVE-2026-31688}
• CVE-2023-53680
  • NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL {CVE-2023-53680}
• CVE-2025-38718
  • sctp: linearize cloned gso packets in sctp_rcv {CVE-2025-38718}
• CVE-2025-38102
  • VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify {CVE-2025-38102}
• CVE-2024-42120
  • drm/amd/display: Check pipe offset before setting vblank {CVE-2024-42120}
• CVE-2022-50093
  • iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE) {CVE-2022-50093}
• CVE-2022-50410
  • NFSD: Protect against send buffer overflow in NFSv2 READ {CVE-2022-50410}
• CVE-2026-23234
  • f2fs: fix to avoid UAF in f2fs_write_end_io() {CVE-2026-23234}
• CVE-2026-43203
  • atm: fore200e: fix use-after-free in tasklets during device removal {CVE-2026-43203}
• CVE-2026-43373
  • net: ncsi: fix skb leak in error paths {CVE-2026-43373}
• CVE-2026-43450
  • netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() {CVE-2026-43450}
• CVE-2026-31399
  • nvdimm/bus: Fix potential use after free in asynchronous initialization {CVE-2026-31399}
• CVE-2026-43449
  • nvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set {CVE-2026-43449}
• CVE-2026-43427
  • usb: class: cdc-wdm: fix reordering issue in read code path {CVE-2026-43427}
• CVE-2026-31452
  • ext4: convert inline data to extents when truncate exceeds inline size {CVE-2026-31452}
• CVE-2026-23397
  • nfnetlink_osf: validate individual option lengths in fingerprints {CVE-2026-23397}
• CVE-2025-71082
  • Bluetooth: btusb: revert use of devm_kzalloc in btusb {CVE-2025-71082}
• CVE-2025-39955
  • tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect(). {CVE-2025-39955}
• CVE-2022-49770
  • ceph: avoid putting the realm twice when decoding snaps fails {CVE-2022-49770}
• CVE-2026-43283
  • net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle {CVE-2026-43283}
• Bump ABI 4.15.0-261

• CVE-2026-46113
  • KVM: x86: Fix shadow paging use-after-free due to unexpected GFN/role {CVE-2026-46113}
• CVE-2022-50300
  • btrfs: fix extent map use-after-free when handling missing device in read_one_chunk {CVE-2022-50300}
• CVE-2022-50082
  • ext4: fix warning in ext4_iomap_begin as race between bmap and write {CVE-2022-50082}
• CVE-2026-43052
  • wifi: mac80211: check tdls flag in ieee80211_tdls_oper {CVE-2026-43052}
• CVE-2026-43386
  • staging: rtl8723bs: fix potential out-of-bounds read in rtw_restruct_wmm_ie {CVE-2026-43386}
• CVE-2026-23281
  • wifi: libertas: fix use-after-free in lbs_free_adapter() {CVE-2026-23281}
• CVE-2026-43141
  • ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut {CVE-2026-43141}
• CVE-2026-23209
  • macvlan: fix error recovery in macvlan_common_newlink() {CVE-2026-23209}
• CVE-2026-23001
  • macvlan: fix possible UAF in macvlan_forward_source() {CVE-2026-23001}
• CVE-2026-31532
  • can: raw: fix ro->uniq use-after-free in raw_rcv() {CVE-2026-31532}
• CVE-2026-31688
  • driver core: enforce device_lock for driver_match_device() {CVE-2026-31688}
• CVE-2023-53680
  • NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL {CVE-2023-53680}
• CVE-2025-38718
  • sctp: linearize cloned gso packets in sctp_rcv {CVE-2025-38718}
• CVE-2025-38102
  • VMCI: fix race between vmci_host_setup_notify and vmci_ctx_unset_notify {CVE-2025-38102}
• CVE-2024-42120
  • drm/amd/display: Check pipe offset before setting vblank {CVE-2024-42120}
• CVE-2022-50093
  • iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE) {CVE-2022-50093}
• CVE-2022-50410
  • NFSD: Protect against send buffer overflow in NFSv2 READ {CVE-2022-50410}
• CVE-2026-23234
  • f2fs: fix to avoid UAF in f2fs_write_end_io() {CVE-2026-23234}
• CVE-2026-43203
  • atm: fore200e: fix use-after-free in tasklets during device removal {CVE-2026-43203}
• CVE-2026-43373
  • net: ncsi: fix skb leak in error paths {CVE-2026-43373}
• CVE-2026-43450
  • netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() {CVE-2026-43450}
• CVE-2026-31399
  • nvdimm/bus: Fix potential use after free in asynchronous initialization {CVE-2026-31399}
• CVE-2026-43449
  • nvme-pci: Fix slab-out-of-bounds in nvme_dbbuf_set {CVE-2026-43449}
• CVE-2026-43427
  • usb: class: cdc-wdm: fix reordering issue in read code path {CVE-2026-43427}
• CVE-2026-31452
  • ext4: convert inline data to extents when truncate exceeds inline size {CVE-2026-31452}
• CVE-2026-23397
  • nfnetlink_osf: validate individual option lengths in fingerprints {CVE-2026-23397}
• CVE-2025-71082
  • Bluetooth: btusb: revert use of devm_kzalloc in btusb {CVE-2025-71082}
• CVE-2025-39955
  • tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect(). {CVE-2025-39955}
• CVE-2022-49770
  • ceph: avoid putting the realm twice when decoding snaps fails {CVE-2022-49770}
• CVE-2026-43283
  • net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle {CVE-2026-43283}
• Bump ABI 4.15.0-261

• Bump kernel ABI to 29: ship the ELS kernel as 4.19.0-29-*, distinct from the prior 4.19.0-28.
• CVE-2021-46984
  • kyber: fix out of bounds access when preempted {CVE-2021-46984}
• CVE-2021-47049
  • Drivers: hv: vmbus: Use after free in __vmbus_open() {CVE-2021-47049}
• CVE-2021-47101
  • asix: fix uninit-value in asix_mdio_read() {CVE-2021-47101}
• CVE-2021-47191
  • scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() {CVE-2021-47191}
• CVE-2021-47352
  • virtio-net: Add validation for used length {CVE-2021-47352}
• CVE-2021-47379
  • blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd {CVE-2021-47379}
• CVE-2021-47391
  • RDMA/cma: Ensure rdma_addr_cancel() happens before issuing more requests {CVE-2021-47391}
• CVE-2021-47479
  • staging: rtl8712: fix use-after-free in rtl8712_dl_fw {CVE-2021-47479}
• CVE-2022-21546
  • scsi: target: Fix WRITE_SAME No Data Buffer crash {CVE-2022-21546}
• CVE-2022-39189
  • KVM: x86: do not report a vCPU as preempted outside instruction boundaries {CVE-2022-39189}
• CVE-2022-43945
  • SUNRPC: Fix svcxdr_init_encode's buflen calculation {CVE-2022-43945}
  • NFSD: Cap rsize_bop result based on send buffer size {CVE-2022-43945}
• CVE-2022-48744
  • net/mlx5e: Avoid field-overflowing memcpy() {CVE-2022-48744}
• CVE-2022-49026
  • e100: Fix possible use after free in e100_xmit_prepare {CVE-2022-49026}
• CVE-2022-49720
  • block: Fix handling of offline queues in blk_mq_alloc_request_hctx() {CVE-2022-49720}
• CVE-2022-49975
  • bpf: Don't redirect packets with invalid pkt_len {CVE-2022-49975}
  • bpf: Move skb->len == 0 checks into __bpf_redirect {CVE-2022-49975}
• CVE-2022-50066
  • net: atlantic: fix aq_vec index out of range error {CVE-2022-50066}
• CVE-2022-50103
  • sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed {CVE-2022-50103}
• CVE-2022-50129
  • RDMA/srpt: Introduce a reference count in struct srpt_device {CVE-2022-50129}
  • RDMA/srpt: Fix a use-after-free {CVE-2022-50129}
• CVE-2022-50300
  • btrfs: fix extent map use-after-free when handling missing device in read_one_chunk {CVE-2022-50300}
• CVE-2022-50406
  • iomap: iomap: fix memory corruption when recording errors during writeback {CVE-2022-50406}
• CVE-2022-50422
  • scsi: libsas: Fix use-after-free bug in smp_execute_task_sg() {CVE-2022-50422}
• CVE-2022-50552
  • blk-mq: use quiesced elevator switch when reinitializing queues {CVE-2022-50552}
• CVE-2023-51779
  • Bluetooth: af_bluetooth: Fix Use-After-Free in bt_sock_recvmsg {CVE-2023-51779}
• CVE-2023-52434
  • smb: client: fix potential OOBs in smb2_parse_contexts() {CVE-2023-52434}
• CVE-2023-52515
  • RDMA/srp: Do not call scsi_done() from srp_abort() {CVE-2023-52515}
• CVE-2023-52531
  • wifi: iwlwifi: mvm: Fix a memory corruption issue {CVE-2023-52531}
• CVE-2023-52741
  • cifs: Fix use-after-free in rdata->read_into_pages() {CVE-2023-52741}
• CVE-2023-53000
  • netlink: prevent potential spectre v1 gadgets {CVE-2023-53000}
• CVE-2023-53039
  • workqueue: Add resource managed version of delayed work init {CVE-2023-53039}
  • devm-helpers: Fix devm_delayed_work_autocancel() kerneldoc {CVE-2023-53039}
  • devm-helpers: Add resource managed version of work init {CVE-2023-53039}
  • HID: intel-ish-hid: ipc: Fix potential use-after-free in work function {CVE-2023-53039}
  • HID: intel-ish-hid: ipc: Fix dev_err usage with uninitialized dev->devc {CVE-2023-53039}
• CVE-2023-53111
  • loop: Fix use-after-free issues {CVE-2023-53111}
• CVE-2023-53254
  • cacheinfo: Fix shared_cpu_map to handle shared caches at different levels…