CVE-2025-38231nfsd: Initialize ssc before laundromat_work to prevent NULL dereference
- 5.5MediumCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% 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: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 16 months later
· 16 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected a4bc287943f5695209ff36bdc89f17b48d68fae7 – < deaeb74ae9318252829c59a84a7d2316fc335660
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < 0fccf5f01ed28725cc313a66ca1247eef911d55e
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < a97668ec6d73dab237cd1c15efe012a10090a4ed
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < 5060e1a5fef184bd11d298e3f0ee920d96a23236
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64
- affected f4e44b393389c77958f7c58bf4415032b4cda15b – < b31da62889e6d610114d81dc7a6edbcaa503fcf8
- affected 5.10.220 – < 5.10.239
- affected 5.14
- unaffected < 5.14
- unaffected 5.10.239 – ≤ 5.10.*
- unaffected 5.15.186 – ≤ 5.15.*
- unaffected 6.1.142 – ≤ 6.1.*
- unaffected 6.6.95 – ≤ 6.6.*
- unaffected 6.12.35 – ≤ 6.12.*
- unaffected 6.15.4 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References10
- https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660 (opens in a new tab)
- https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55e (opens in a new tab)
- https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed (opens in a new tab)
- https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236 (opens in a new tab)
- https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 (opens in a new tab)
- https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 (opens in a new tab)
- https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.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-2025-20025 (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-2025-38231)Record last updated .