{"api_version":"1","generated_at":"2026-07-20T14:43:02+00:00","cve":"CVE-2026-64156","urls":{"html":"https://cve.report/CVE-2026-64156","api":"https://cve.report/api/cve/CVE-2026-64156.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64156","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64156"},"summary":{"title":"netfs, afs: Fix write skipping in dir/link writepages","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs, afs: Fix write skipping in dir/link writepages\n\nFix netfs_write_single() and afs_single_writepages() to better handle a\nwrite that would be skipped due to lock contention and WB_SYNC_NONE by\nreturning 1 from netfs_write_single() if it skipped and making\nafs_single_writepages() skip also.  If a skip occurs, the inode must be\nre-marked as the VFS may have cleared the mark.\n\nThis is really only theoretical for directories in netfs_write_single() as\nthe only path to that is through afs_single_writepages() that takes the\n->validate_lock around it, thereby serialising it.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:57","updated_at":"2026-07-19 16:17:57"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5","name":"https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90","name":"https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c","name":"https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64156","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64156","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6dd80936618c4ff852d4db73aca400351d9bd9f0 77bb293049d61e04c12b24ebbffafaf5ab36af90 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6dd80936618c4ff852d4db73aca400351d9bd9f0 f91e10435c0dd37c48b1b25e6236284f656ddc0c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6dd80936618c4ff852d4db73aca400351d9bd9f0 9871938f99cc6cb266a77265491660e2375271f5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/afs/dir.c","fs/netfs/write_issue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"77bb293049d61e04c12b24ebbffafaf5ab36af90","status":"affected","version":"6dd80936618c4ff852d4db73aca400351d9bd9f0","versionType":"git"},{"lessThan":"f91e10435c0dd37c48b1b25e6236284f656ddc0c","status":"affected","version":"6dd80936618c4ff852d4db73aca400351d9bd9f0","versionType":"git"},{"lessThan":"9871938f99cc6cb266a77265491660e2375271f5","status":"affected","version":"6dd80936618c4ff852d4db73aca400351d9bd9f0","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/afs/dir.c","fs/netfs/write_issue.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs, afs: Fix write skipping in dir/link writepages\n\nFix netfs_write_single() and afs_single_writepages() to better handle a\nwrite that would be skipped due to lock contention and WB_SYNC_NONE by\nreturning 1 from netfs_write_single() if it skipped and making\nafs_single_writepages() skip also.  If a skip occurs, the inode must be\nre-marked as the VFS may have cleared the mark.\n\nThis is really only theoretical for directories in netfs_write_single() as\nthe only path to that is through afs_single_writepages() that takes the\n->validate_lock around it, thereby serialising it."}],"providerMetadata":{"dateUpdated":"2026-07-19T15:40:44.277Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/77bb293049d61e04c12b24ebbffafaf5ab36af90"},{"url":"https://git.kernel.org/stable/c/f91e10435c0dd37c48b1b25e6236284f656ddc0c"},{"url":"https://git.kernel.org/stable/c/9871938f99cc6cb266a77265491660e2375271f5"}],"title":"netfs, afs: Fix write skipping in dir/link writepages","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64156","datePublished":"2026-07-19T15:40:44.277Z","dateReserved":"2026-07-19T07:54:57.038Z","dateUpdated":"2026-07-19T15:40:44.277Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:57","lastModifiedDate":"2026-07-19 16:17:57","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64156","Ordinal":"1","Title":"netfs, afs: Fix write skipping in dir/link writepages","CVE":"CVE-2026-64156","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64156","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs, afs: Fix write skipping in dir/link writepages\n\nFix netfs_write_single() and afs_single_writepages() to better handle a\nwrite that would be skipped due to lock contention and WB_SYNC_NONE by\nreturning 1 from netfs_write_single() if it skipped and making\nafs_single_writepages() skip also.  If a skip occurs, the inode must be\nre-marked as the VFS may have cleared the mark.\n\nThis is really only theoretical for directories in netfs_write_single() as\nthe only path to that is through afs_single_writepages() that takes the\n->validate_lock around it, thereby serialising it.","Type":"Description","Title":"netfs, afs: Fix write skipping in dir/link writepages"}]}}}