4.7

CVE-2023-53204: linux Race Condition

CVSS: 4.7v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2023-53204DEBIAN-CVE-2023-53204
Published 15-09-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2023-53204 is a medium (CVSS 4.7) Race Condition vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (NVD)
EPSS score
0.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 11
RHSA-2024:2394SUSE-SU-2025:03600-1SUSE-SU-2025:03634-1SUSE-SU-2025:20851-1SUSE-SU-2025:20861-1SUSE-SU-2025:20870-1

Timeline

  1. 15-09-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu123 products
  • linuxAll versions (No fix recorded) | < 5.4.0-169.187 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1116.126 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < df97b5ea9f3ac9308c3a633524dab382cd59d9e5 | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < 03d133dfbcec9d439729cc64706c7eb6d1663a24 | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < adcf4e069358cdee8593663650ea447215a1c49e | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < b401d7e485b0a234cf8fe9a6ae99dbcd20863138 | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < 9151ed4b006125cba7c06c79df504340ea4e9386 | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < ac92f239a079678a035c0faad9089354a874aede | ≥ 712f4aad406bb1ed67f3f98d04c044191f0ff593, < 0bc36c0650b21df36fbec8136add83936eaf0607 | a5a6cf8c405e826ff7ed1308dde72560c0ed4854 | df87da0783c4492b944badfea9d5c3c56b834697 | 3d024dcef2548028e9f9b7876a544e6e0af00175 | aa51d1c24ec3b6605f7cc7ef500c96cd71d7ef90 | a5b9e44af8d3edaf49d14a91cc519a9fba439e67 | dc6b0ec667f67d4768e72c1b7f1bbc14ea52379c | 9b8b611fe0f86f07a4ff4a5f3bcb0ea7ceb7da3b | 5e226f9689d90ad8ab21b4a969ae3058777f0aff | ≥ 3.2.78, < 3.3 | ≥ 3.10.96, < 3.11 | ≥ 3.12.57, < 3.13 | ≥ 3.14.60, < 3.15 | ≥ 3.18.27, < 3.19 | ≥ 4.1.17, < 4.2 | ≥ 4.3.5, < 4.4 | ≥ 4.4.1, < 4.5 | 4.5
  • linux_kernel≥ 3.2.78, < 3.3 | ≥ 3.10.96, < 3.11 | ≥ 3.12.57, < 3.13 | ≥ 3.14.60, < 3.15 | ≥ 3.18.27, < 3.19 | ≥ 4.1.17, < 4.2 | ≥ 4.3.5, < 4.4 | ≥ 4.4.1, < 4.14.326 | ≥ 4.15, < 4.19.295 | ≥ 4.20, < 5.4.257 | ≥ 5.5, < 5.10.195 | ≥ 5.11, < 5.15.132 | ≥ 5.16, < 6.1.54 | ≥ 6.2, < 6.5.4
Debian1 product
  • linux< 6.1.55-1 | < 6.5.6-1

3 vendors · 126 products

References

12 links
Show all 12 references