{"id":"CVE-2026-93211","state":"PUBLISHED","title":"nfsd: initialize DRC hash table before registering shrinker","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: initialize DRC hash table before registering shrinker\n\nshrinker_register() precedes the INIT_LIST_HEAD loop and the\ndrc_hashsize store. On weakly-ordered architectures (arm64, ppc),\na shrinker scan can observe drc_hashsize before the bucket list\nheads are initialized, causing a NULL deref in the DRC shrinker\ncallback.\n\nMove bucket initialization and the drc_hashsize store before\nshrinker_register() so the hash table is fully initialized before\nit becomes visible to the shrinker.","publishedAt":"2026-09-24T15:10:34.407Z","updatedAt":"2026-10-19T09:07:23.361Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"f060f43a67635dbb393bf5dcbfc3e8b9a44942cb","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"b57bd8cb739cb3cf88bdb1a5903a42a707a5c282","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"431c70ca5163c98c746f22f16cd58ca5aefec6dc","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"b0c58934f5cc4f05b63ef6605dd10c1d0d489e88","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfscache.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfscache.c"]}],"references":["https://git.kernel.org/stable/c/f060f43a67635dbb393bf5dcbfc3e8b9a44942cb","https://git.kernel.org/stable/c/b57bd8cb739cb3cf88bdb1a5903a42a707a5c282","https://git.kernel.org/stable/c/431c70ca5163c98c746f22f16cd58ca5aefec6dc","https://git.kernel.org/stable/c/b0c58934f5cc4f05b63ef6605dd10c1d0d489e88"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93211.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93211","state":"PUBLISHED","datePublished":"2026-09-24T15:10:34.407Z","dateUpdated":"2026-10-19T09:07:23.361Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.093Z"},"containers":{"cna":{"title":"nfsd: initialize DRC hash table before registering shrinker","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: initialize DRC hash table before registering shrinker\n\nshrinker_register() precedes the INIT_LIST_HEAD loop and the\ndrc_hashsize store. On weakly-ordered architectures (arm64, ppc),\na shrinker scan can observe drc_hashsize before the bucket list\nheads are initialized, causing a NULL deref in the DRC shrinker\ncallback.\n\nMove bucket initialization and the drc_hashsize store before\nshrinker_register() so the hash table is fully initialized before\nit becomes visible to the shrinker."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"f060f43a67635dbb393bf5dcbfc3e8b9a44942cb","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"b57bd8cb739cb3cf88bdb1a5903a42a707a5c282","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"431c70ca5163c98c746f22f16cd58ca5aefec6dc","versionType":"git"},{"version":"8eea99a81c6f67c08fedd7db2ccd09aa93db69a7","status":"affected","lessThan":"b0c58934f5cc4f05b63ef6605dd10c1d0d489e88","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfscache.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nfsd/nfscache.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f060f43a67635dbb393bf5dcbfc3e8b9a44942cb"},{"url":"https://git.kernel.org/stable/c/b57bd8cb739cb3cf88bdb1a5903a42a707a5c282"},{"url":"https://git.kernel.org/stable/c/431c70ca5163c98c746f22f16cd58ca5aefec6dc"},{"url":"https://git.kernel.org/stable/c/b0c58934f5cc4f05b63ef6605dd10c1d0d489e88"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:07:23.361Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}