Answer in brief
CVE-2023-53204 records a Medium severity (CVSS 4.7) vulnerability in af_unix: Fix data-races around user->unix_inflight.. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=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 | df97b5ea9f3ac9308c3a633524dab382cd59d9e5, 03d133dfbcec9d439729cc64706c7eb6d1663a24, adcf4e069358cdee8593663650ea447215a1c49e, b401d7e485b0a234cf8fe9a6ae99dbcd20863138, 9151ed4b006125cba7c06c79df504340ea4e9386, b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f, ac92f239a079678a035c0faad9089354a874aede, 0bc36c0650b21df36fbec8136add83936eaf0607, 3.3, 3.11, 3.13, 3.15, 3.19, 4.2, 4.4, 4.5 |
| Linux/Linuxgeneric | 4.5 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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
Quoted source text, attributed separately from HOL analysis.