Action not permitted
Modal body text goes here.
Modal Title
Modal Body
EUVD-2026-320464
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 07:40
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T07:40:42.808673+00:00",
"id": "EUVD-2026-320464"
}
CVE-2023-53204 (GCVE-0-2023-53204)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-23 15:28
VLAI
EPSS
VEX
Title
af_unix: Fix data-races around user->unix_inflight.
Summary
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
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
712f4aad406bb1ed67f3f98d04c044191f0ff593 , < df97b5ea9f3ac9308c3a633524dab382cd59d9e5
(git)
Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < 03d133dfbcec9d439729cc64706c7eb6d1663a24 (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < adcf4e069358cdee8593663650ea447215a1c49e (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < b401d7e485b0a234cf8fe9a6ae99dbcd20863138 (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < 9151ed4b006125cba7c06c79df504340ea4e9386 (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < ac92f239a079678a035c0faad9089354a874aede (git) Affected: 712f4aad406bb1ed67f3f98d04c044191f0ff593 , < 0bc36c0650b21df36fbec8136add83936eaf0607 (git) Affected: a5a6cf8c405e826ff7ed1308dde72560c0ed4854 (git) Affected: df87da0783c4492b944badfea9d5c3c56b834697 (git) Affected: 3d024dcef2548028e9f9b7876a544e6e0af00175 (git) Affected: aa51d1c24ec3b6605f7cc7ef500c96cd71d7ef90 (git) Affected: a5b9e44af8d3edaf49d14a91cc519a9fba439e67 (git) Affected: dc6b0ec667f67d4768e72c1b7f1bbc14ea52379c (git) Affected: 9b8b611fe0f86f07a4ff4a5f3bcb0ea7ceb7da3b (git) Affected: 5e226f9689d90ad8ab21b4a969ae3058777f0aff (git) Affected: 3.2.78 , < 3.3 (semver) Affected: 3.10.96 , < 3.11 (semver) Affected: 3.12.57 , < 3.13 (semver) Affected: 3.14.60 , < 3.15 (semver) Affected: 3.18.27 , < 3.19 (semver) Affected: 4.1.17 , < 4.2 (semver) Affected: 4.3.5 , < 4.4 (semver) Affected: 4.4.1 , < 4.5 (semver) |
|
| Linux | Linux |
Affected:
4.5
Unaffected: 0 , < 4.5 (semver) Unaffected: 4.14.326 , ≤ 4.14.* (semver) Unaffected: 4.19.295 , ≤ 4.19.* (semver) Unaffected: 5.4.257 , ≤ 5.4.* (semver) Unaffected: 5.10.195 , ≤ 5.10.* (semver) Unaffected: 5.15.132 , ≤ 5.15.* (semver) Unaffected: 6.1.54 , ≤ 6.1.* (semver) Unaffected: 6.5.4 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/unix/scm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "df97b5ea9f3ac9308c3a633524dab382cd59d9e5",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "03d133dfbcec9d439729cc64706c7eb6d1663a24",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "adcf4e069358cdee8593663650ea447215a1c49e",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "b401d7e485b0a234cf8fe9a6ae99dbcd20863138",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "9151ed4b006125cba7c06c79df504340ea4e9386",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "ac92f239a079678a035c0faad9089354a874aede",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"lessThan": "0bc36c0650b21df36fbec8136add83936eaf0607",
"status": "affected",
"version": "712f4aad406bb1ed67f3f98d04c044191f0ff593",
"versionType": "git"
},
{
"status": "affected",
"version": "a5a6cf8c405e826ff7ed1308dde72560c0ed4854",
"versionType": "git"
},
{
"status": "affected",
"version": "df87da0783c4492b944badfea9d5c3c56b834697",
"versionType": "git"
},
{
"status": "affected",
"version": "3d024dcef2548028e9f9b7876a544e6e0af00175",
"versionType": "git"
},
{
"status": "affected",
"version": "aa51d1c24ec3b6605f7cc7ef500c96cd71d7ef90",
"versionType": "git"
},
{
"status": "affected",
"version": "a5b9e44af8d3edaf49d14a91cc519a9fba439e67",
"versionType": "git"
},
{
"status": "affected",
"version": "dc6b0ec667f67d4768e72c1b7f1bbc14ea52379c",
"versionType": "git"
},
{
"status": "affected",
"version": "9b8b611fe0f86f07a4ff4a5f3bcb0ea7ceb7da3b",
"versionType": "git"
},
{
"status": "affected",
"version": "5e226f9689d90ad8ab21b4a969ae3058777f0aff",
"versionType": "git"
},
{
"lessThan": "3.3",
"status": "affected",
"version": "3.2.78",
"versionType": "semver"
},
{
"lessThan": "3.11",
"status": "affected",
"version": "3.10.96",
"versionType": "semver"
},
{
"lessThan": "3.13",
"status": "affected",
"version": "3.12.57",
"versionType": "semver"
},
{
"lessThan": "3.15",
"status": "affected",
"version": "3.14.60",
"versionType": "semver"
},
{
"lessThan": "3.19",
"status": "affected",
"version": "3.18.27",
"versionType": "semver"
},
{
"lessThan": "4.2",
"status": "affected",
"version": "4.1.17",
"versionType": "semver"
},
{
"lessThan": "4.4",
"status": "affected",
"version": "4.3.5",
"versionType": "semver"
},
{
"lessThan": "4.5",
"status": "affected",
"version": "4.4.1",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/unix/scm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.5"
},
{
"lessThan": "4.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.326",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.295",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.257",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.14.326",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.295",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.257",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.195",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.132",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.54",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5.4",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6",
"versionStartIncluding": "4.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.2.78",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.10.96",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.12.57",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.14.60",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.18.27",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.1.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.3.5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.4.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix data-races around user-\u003eunix_inflight.\n\nuser-\u003eunix_inflight is changed under spin_lock(unix_gc_lock),\nbut too_many_unix_fds() reads it locklessly.\n\nLet\u0027s annotate the write/read accesses to user-\u003eunix_inflight.\n\nBUG: KCSAN: data-race in unix_attach_fds / unix_inflight\n\nwrite to 0xffffffff8546f2d0 of 8 bytes by task 44798 on cpu 1:\n unix_inflight+0x157/0x180 net/unix/scm.c:66\n unix_attach_fds+0x147/0x1e0 net/unix/scm.c:123\n unix_scm_to_skb net/unix/af_unix.c:1827 [inline]\n unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950\n unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]\n unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292\n sock_sendmsg_nosec net/socket.c:725 [inline]\n sock_sendmsg+0x148/0x160 net/socket.c:748\n ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494\n ___sys_sendmsg+0xc6/0x140 net/socket.c:2548\n __sys_sendmsg+0x94/0x140 net/socket.c:2577\n __do_sys_sendmsg net/socket.c:2586 [inline]\n __se_sys_sendmsg net/socket.c:2584 [inline]\n __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nread to 0xffffffff8546f2d0 of 8 bytes by task 44814 on cpu 0:\n too_many_unix_fds net/unix/scm.c:101 [inline]\n unix_attach_fds+0x54/0x1e0 net/unix/scm.c:110\n unix_scm_to_skb net/unix/af_unix.c:1827 [inline]\n unix_dgram_sendmsg+0x46a/0x14f0 net/unix/af_unix.c:1950\n unix_seqpacket_sendmsg net/unix/af_unix.c:2308 [inline]\n unix_seqpacket_sendmsg+0xba/0x130 net/unix/af_unix.c:2292\n sock_sendmsg_nosec net/socket.c:725 [inline]\n sock_sendmsg+0x148/0x160 net/socket.c:748\n ____sys_sendmsg+0x4e4/0x610 net/socket.c:2494\n ___sys_sendmsg+0xc6/0x140 net/socket.c:2548\n __sys_sendmsg+0x94/0x140 net/socket.c:2577\n __do_sys_sendmsg net/socket.c:2586 [inline]\n __se_sys_sendmsg net/socket.c:2584 [inline]\n __x64_sys_sendmsg+0x45/0x50 net/socket.c:2584\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nvalue changed: 0x000000000000000c -\u003e 0x000000000000000d\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 44814 Comm: systemd-coredum Not tainted 6.4.0-11989-g6843306689af #6\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-23T15:28:14.623Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/df97b5ea9f3ac9308c3a633524dab382cd59d9e5"
},
{
"url": "https://git.kernel.org/stable/c/03d133dfbcec9d439729cc64706c7eb6d1663a24"
},
{
"url": "https://git.kernel.org/stable/c/adcf4e069358cdee8593663650ea447215a1c49e"
},
{
"url": "https://git.kernel.org/stable/c/b401d7e485b0a234cf8fe9a6ae99dbcd20863138"
},
{
"url": "https://git.kernel.org/stable/c/9151ed4b006125cba7c06c79df504340ea4e9386"
},
{
"url": "https://git.kernel.org/stable/c/b9cdbb38e030fc2fe97fe27b54cbb6b4fbff250f"
},
{
"url": "https://git.kernel.org/stable/c/ac92f239a079678a035c0faad9089354a874aede"
},
{
"url": "https://git.kernel.org/stable/c/0bc36c0650b21df36fbec8136add83936eaf0607"
}
],
"title": "af_unix: Fix data-races around user-\u003eunix_inflight.",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-53204",
"datePublished": "2025-09-15T14:21:32.696Z",
"dateReserved": "2025-09-15T13:59:19.068Z",
"dateUpdated": "2026-05-23T15:28:14.623Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…
Loading…