{"id":"CVE-2026-64040","state":"PUBLISHED","title":"cachefiles: Fix error return when vfs_mkdir() fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: Fix error return when vfs_mkdir() fails\n\nWhen vfs_mkdir() fails, the error code is not extracted from the\nreturned error pointer. This causes mkdir_error to be reached with\nret=0, which leads to returning ERR_PTR(0) (NULL) instead of a\nproper error pointer.\n\nFix this by extracting the error code from the error pointer when\nvfs_mkdir() fails.","publishedAt":"2026-07-19T15:39:27.348Z","updatedAt":"2026-10-15T10:07:58.219Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"86f4c1586418d50203ee8d76cba5d7b148719a32","versionType":"git"},{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"0940108d27c6995e02819ff832be11892f0b208b","versionType":"git"},{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"8a220d1c312c66194f4a33dd52d1fba42bc2b341","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/namei.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/namei.c"]}],"references":["https://git.kernel.org/stable/c/86f4c1586418d50203ee8d76cba5d7b148719a32","https://git.kernel.org/stable/c/0940108d27c6995e02819ff832be11892f0b208b","https://git.kernel.org/stable/c/8a220d1c312c66194f4a33dd52d1fba42bc2b341"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64040.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64040","state":"PUBLISHED","datePublished":"2026-07-19T15:39:27.348Z","dateUpdated":"2026-10-15T10:07:58.219Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.029Z"},"containers":{"cna":{"title":"cachefiles: Fix error return when vfs_mkdir() fails","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: Fix error return when vfs_mkdir() fails\n\nWhen vfs_mkdir() fails, the error code is not extracted from the\nreturned error pointer. This causes mkdir_error to be reached with\nret=0, which leads to returning ERR_PTR(0) (NULL) instead of a\nproper error pointer.\n\nFix this by extracting the error code from the error pointer when\nvfs_mkdir() fails."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"86f4c1586418d50203ee8d76cba5d7b148719a32","versionType":"git"},{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"0940108d27c6995e02819ff832be11892f0b208b","versionType":"git"},{"version":"406fad7698f5bf21ab6b5ca195bf4b9e0b3990ed","status":"affected","lessThan":"8a220d1c312c66194f4a33dd52d1fba42bc2b341","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/namei.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/cachefiles/namei.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/86f4c1586418d50203ee8d76cba5d7b148719a32"},{"url":"https://git.kernel.org/stable/c/0940108d27c6995e02819ff832be11892f0b208b"},{"url":"https://git.kernel.org/stable/c/8a220d1c312c66194f4a33dd52d1fba42bc2b341"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-15T10:07:58.219Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}