{"id":"CVE-2025-38231","state":"PUBLISHED","title":"nfsd: Initialize ssc before laundromat_work to prevent NULL dereference","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: Initialize ssc before laundromat_work to prevent NULL dereference\n\nIn nfs4_state_start_net(), laundromat_work may access nfsd_ssc through\nnfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized,\nthis can cause NULL pointer dereference.\n\nNormally the delayed start of laundromat_work allows sufficient time for\nnfsd_ssc initialization to complete. However, when the kernel waits too\nlong for userspace responses (e.g. in nfs4_state_start_net ->\nnfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done ->\ncld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the\ndelayed work may start before nfsd_ssc initialization finishes.\n\nFix this by moving nfsd_ssc initialization before starting laundromat_work.","publishedAt":"2025-07-04T13:37:44.978Z","updatedAt":"2026-10-15T01:06:53.634Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4bc287943f5695209ff36bdc89f17b48d68fae7","status":"affected","lessThan":"deaeb74ae9318252829c59a84a7d2316fc335660","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"0fccf5f01ed28725cc313a66ca1247eef911d55e","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"a97668ec6d73dab237cd1c15efe012a10090a4ed","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"5060e1a5fef184bd11d298e3f0ee920d96a23236","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"b31da62889e6d610114d81dc7a6edbcaa503fcf8","versionType":"git"},{"version":"5.10.220","status":"affected","lessThan":"5.10.239","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfssvc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.10.239","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.186","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.142","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.95","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.35","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.4","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfssvc.c"]}],"references":["https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660","https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55e","https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed","https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236","https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0","https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64","https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8","https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","https://cert-portal.siemens.com/productcert/html/ssa-082556.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38231.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38231","state":"PUBLISHED","datePublished":"2025-07-04T13:37:44.978Z","dateUpdated":"2026-10-15T01:06:53.634Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.996Z"},"containers":{"cna":{"title":"nfsd: Initialize ssc before laundromat_work to prevent NULL dereference","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: Initialize ssc before laundromat_work to prevent NULL dereference\n\nIn nfs4_state_start_net(), laundromat_work may access nfsd_ssc through\nnfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized,\nthis can cause NULL pointer dereference.\n\nNormally the delayed start of laundromat_work allows sufficient time for\nnfsd_ssc initialization to complete. However, when the kernel waits too\nlong for userspace responses (e.g. in nfs4_state_start_net ->\nnfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done ->\ncld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the\ndelayed work may start before nfsd_ssc initialization finishes.\n\nFix this by moving nfsd_ssc initialization before starting laundromat_work."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4bc287943f5695209ff36bdc89f17b48d68fae7","status":"affected","lessThan":"deaeb74ae9318252829c59a84a7d2316fc335660","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"0fccf5f01ed28725cc313a66ca1247eef911d55e","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"a97668ec6d73dab237cd1c15efe012a10090a4ed","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"5060e1a5fef184bd11d298e3f0ee920d96a23236","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64","versionType":"git"},{"version":"f4e44b393389c77958f7c58bf4415032b4cda15b","status":"affected","lessThan":"b31da62889e6d610114d81dc7a6edbcaa503fcf8","versionType":"git"},{"version":"5.10.220","status":"affected","lessThan":"5.10.239","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfssvc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.10.239","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.186","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.142","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.95","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.35","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.4","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfssvc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/deaeb74ae9318252829c59a84a7d2316fc335660"},{"url":"https://git.kernel.org/stable/c/0fccf5f01ed28725cc313a66ca1247eef911d55e"},{"url":"https://git.kernel.org/stable/c/a97668ec6d73dab237cd1c15efe012a10090a4ed"},{"url":"https://git.kernel.org/stable/c/5060e1a5fef184bd11d298e3f0ee920d96a23236"},{"url":"https://git.kernel.org/stable/c/d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0"},{"url":"https://git.kernel.org/stable/c/83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64"},{"url":"https://git.kernel.org/stable/c/b31da62889e6d610114d81dc7a6edbcaa503fcf8"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:59:15.961Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.220","versionEndExcluding":"5.10.239"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"5.15.186"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.1.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.15.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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