CVE-2023-53204

MEDIUM EPSS 1.5%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
4.7 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: af_unix: Fix data-races around user->unix_inflight. user->unix_inflight is changed under spin_lock(unix_gc_lock), but too_many_unix_fds() reads it locklessly. Let's annotate the write/read accesses to user->unix_inflight. BUG: KCSAN: data-race in unix_attach_fds / unix_inflight write to 0xffffffff8546f2d0 of 8 bytes by task 44798 on cpu 1: unix_inflight+0x157/0x180 net/unix/scm.c:66 unix_attach_fds+0x147/0x1e0 net/unix/scm.c:123 unix_scm_to_skb net/unix/af_unix.c:1827 [inline] unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950 unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline] unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0x148/0x160 net/socket.c:748 ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494 ___sys_sendmsg+0xc6/0x140 net/socket.c:2548 __sys_sendmsg+0x94/0x140 net/socket.c:2577 __do_sys_sendmsg net/socket.c:2586 [inline] __se_sys_sendmsg net/socket.c:2584 [inline] __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 read to 0xffffffff8546f2d0 of 8 bytes by task 44814 on cpu 0: too_many_unix_fds net/unix/scm.c:101 [inline] unix_attach_fds+0x54/0x1e0 net/unix/scm.c:110 unix_scm_to_skb net/unix/af_unix.c:1827 [inline] unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950 unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline] unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0x148/0x160 net/socket.c:748 ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494 ___sys_sendmsg+0xc6/0x140 net/socket.c:2548 __sys_sendmsg+0x94/0x140 net/socket.c:2577 __do_sys_sendmsg net/socket.c:2586 [inline] __se_sys_sendmsg net/socket.c:2584 [inline] __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 value changed: 0x000000000000000c -> 0x000000000000000d Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 44814 Comm: systemd-coredum Not tainted 6.4.0-11989-g6843306689af #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014

CVSS Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥3.2.78  –  <3.3
linuxlinux_kernel*≥3.10.96  –  <3.11
linuxlinux_kernel*≥3.12.57  –  <3.13
linuxlinux_kernel*≥3.14.60  –  <3.15
linuxlinux_kernel*≥3.18.27  –  <3.19
linuxlinux_kernel*≥4.1.17  –  <4.2
linuxlinux_kernel*≥4.3.5  –  <4.4
linuxlinux_kernel*≥4.4.1  –  <4.14.326
linuxlinux_kernel*≥4.15  –  <4.19.295
linuxlinux_kernel*≥4.20  –  <5.4.257
linuxlinux_kernel*≥5.5  –  <5.10.195
linuxlinux_kernel*≥5.11  –  <5.15.132
linuxlinux_kernel*≥5.16  –  <6.1.54
linuxlinux_kernel*≥6.2  –  <6.5.4

References 8

  • git.kernel.org https://git.kernel.org/stable/c/03d133dfbcec9d439729cc64706c7eb6d1663a24
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0bc36c0650b21df36fbec8136add83936eaf0607
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9151ed4b006125cba7c06c79df504340ea4e9386
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac92f239a079678a035c0faad9089354a874aede
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/adcf4e069358cdee8593663650ea447215a1c49e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b401d7e485b0a234cf8fe9a6ae99dbcd20863138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df97b5ea9f3ac9308c3a633524dab382cd59d9e5
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/03d133dfbcec9d439729cc64706c7eb6d1663a24
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0bc36c0650b21df36fbec8136add83936eaf0607
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9151ed4b006125cba7c06c79df504340ea4e9386
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac92f239a079678a035c0faad9089354a874aede
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/adcf4e069358cdee8593663650ea447215a1c49e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b401d7e485b0a234cf8fe9a6ae99dbcd20863138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df97b5ea9f3ac9308c3a633524dab382cd59d9e5
    Patch