CVE-2022-50265

MEDIUM EPSS 4.2%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: kcm: annotate data-races around kcm->rx_wait kcm->rx_psock can be read locklessly in kcm_rfree(). Annotate the read and writes accordingly. syzbot reported: BUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree write to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1: reserve_rx_kcm net/kcm/kcmsock.c:283 [inline] kcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363 __strp_recv+0x64c/0xd20 net/strparser/strparser.c:301 strp_recv+0x6d/0x80 net/strparser/strparser.c:335 tcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703 strp_read_sock net/strparser/strparser.c:358 [inline] do_strp_work net/strparser/strparser.c:406 [inline] strp_work+0xe8/0x180 net/strparser/strparser.c:415 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 read to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0: kcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181 skb_release_head_state+0x8e/0x160 net/core/skbuff.c:841 skb_release_all net/core/skbuff.c:852 [inline] __kfree_skb net/core/skbuff.c:868 [inline] kfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891 kfree_skb include/linux/skbuff.h:1216 [inline] kcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161 ____sys_recvmsg+0x16c/0x2e0 ___sys_recvmsg net/socket.c:2743 [inline] do_recvmmsg+0x2f1/0x710 net/socket.c:2837 __sys_recvmmsg net/socket.c:2916 [inline] __do_sys_recvmmsg net/socket.c:2939 [inline] __se_sys_recvmmsg net/socket.c:2932 [inline] __x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.6  –  <4.9.332
linuxlinux_kernel*≥4.10  –  <4.14.298
linuxlinux_kernel*≥4.15  –  <4.19.264
linuxlinux_kernel*≥4.20  –  <5.4.223
linuxlinux_kernel*≥5.5  –  <5.10.153
linuxlinux_kernel*≥5.11  –  <5.15.77
linuxlinux_kernel*≥5.16  –  <6.0.7
linuxlinux_kernel6.1any
linuxlinux_kernel6.1any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d
    Patch