CVE-2026-31673af_unix: read UNIX_DIAG_VFS data under unix_state_lock
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: af_unix: read UNIX_DIAG_VFS data under unix_state_lock Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking. Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock. This keeps the VFS data stable while the reply is being built.
Timeline
ID reserved
By Linux
- 47 days later
· 47 days later
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < e7339db13b9ddb63417b12da55fd6191e59f7442
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < c3ec44ab4526bbc4b6c9fc845af86488244f4c9b
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < b9232421a77a649c9376c99fdfc8cb7f79cad34c
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < 0c739f3785f84af695952c2bac8be2f45082c9b8
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < 900a4e0910e98b8caef117d5df00471fa438dcf9
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < bdf206e740bf2919d818f132c8c9cc7ed91d11c0
- affected 5f7b0569460b7d8d01ca776430a00505a68b7584 – < 39897df386376912d561d4946499379effa1e7ef
- affected 3.3
- unaffected < 3.3
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.136 – ≤ 6.6.*
- unaffected 6.12.83 – ≤ 6.12.*
- unaffected 6.18.24 – ≤ 6.18.*
- unaffected 6.19.14 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References9
- https://git.kernel.org/stable/c/e7339db13b9ddb63417b12da55fd6191e59f7442 (opens in a new tab)
- https://git.kernel.org/stable/c/4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7 (opens in a new tab)
- https://git.kernel.org/stable/c/c3ec44ab4526bbc4b6c9fc845af86488244f4c9b (opens in a new tab)
- https://git.kernel.org/stable/c/b9232421a77a649c9376c99fdfc8cb7f79cad34c (opens in a new tab)
- https://git.kernel.org/stable/c/0c739f3785f84af695952c2bac8be2f45082c9b8 (opens in a new tab)
- https://git.kernel.org/stable/c/900a4e0910e98b8caef117d5df00471fa438dcf9 (opens in a new tab)
- https://git.kernel.org/stable/c/bdf206e740bf2919d818f132c8c9cc7ed91d11c0 (opens in a new tab)
- https://git.kernel.org/stable/c/39897df386376912d561d4946499379effa1e7ef (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-25640 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31673)Record last updated .