CVE-2025-38231
nfsd: Initialize ssc before laundromat_work to prevent NULL dereference
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ a4bc287943f5695209ff36bdc89f17b48d68fae7; < deaeb74ae9318252829c59a84a7d2316fc335660 (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < 0fccf5f01ed28725cc313a66ca1247eef911d55e (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < a97668ec6d73dab237cd1c15efe012a10090a4ed (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < 5060e1a5fef184bd11d298e3f0ee920d96a23236 (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 (affected, git) ≥ f4e44b393389c77958f7c58bf4415032b4cda15b; < b31da62889e6d610114d81dc7a6edbcaa503fcf8 (affected, git) ≥ 5.10.220; < 5.10.239 (affected, semver) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
5.14 (affected) ≥ 0; < 5.14 (unaffected, semver) ≥ 5.10.239; ≤ 5.10.* (unaffected, semver) ≥ 5.15.186; ≤ 5.15.* (unaffected, semver) ≥ 6.1.142; ≤ 6.1.* (unaffected, semver) ≥ 6.6.95; ≤ 6.6.* (unaffected, semver) ≥ 6.12.35; ≤ 6.12.* (unaffected, semver) ≥ 6.15.4; ≤ 6.15.* (unaffected, semver) ≥ 6.16; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660CNA: Linux
- https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55eCNA: Linux
- https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4edCNA: Linux
- https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236CNA: Linux
- https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0CNA: Linux
- https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64CNA: Linux
- https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8CNA: Linux
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlADP: CVE
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlADP: CVE
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlADP: siemens-SADP
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