{"api_version":"1","generated_at":"2026-09-30T03:23:32+00:00","cve":"CVE-2026-90318","urls":{"html":"https://cve.report/CVE-2026-90318","api":"https://cve.report/api/cve/CVE-2026-90318.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90318","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90318"},"summary":{"title":"fat: release buffer head after rebuilding parent","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfat: release buffer head after rebuilding parent\n\nfat_scan_logstart() leaves the matching directory entry's buffer head in\nsinfo.bh for the caller to release, just like fat_scan().\n\nfat_rebuild_parent() uses the directory entry to rebuild the parent inode\nfor the nostale_ro NFS export path, but does not release sinfo.bh after a\nsuccessful scan.  Release it once fat_build_inode() has consumed the\ndirectory entry data.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:29","updated_at":"2026-09-17 17:17:29"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8","name":"https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee","name":"https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393","name":"https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3","name":"https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826","name":"https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a","name":"https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1","name":"https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755","name":"https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90318","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90318","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 5e44b6944e11fd6647f028219ad0be4e85e9acee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 d2a86329152c69a6200c15b2bf618755f8563826 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f1e6fb0ab451dae8523fbb8c119a653b2730e938 e38587d98d1ceac608420052c0cdd901d25878f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * 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/fat/nfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5e44b6944e11fd6647f028219ad0be4e85e9acee","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"d2a86329152c69a6200c15b2bf618755f8563826","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"0f18d712ba9c980e05b7e33a27cde4fe3ed2d393","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"e38587d98d1ceac608420052c0cdd901d25878f3","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"c6a67aa438179cad40f8ae45469e304338d65c0a","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"571ea4263d69df1b48578e4314a828ecd0604755","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"7565e44507634514e3e1899d3acad3de43f7a2c1","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"},{"lessThan":"83e98dbf19ab64e8528e101e20f8d50e1aaa68a8","status":"affected","version":"f1e6fb0ab451dae8523fbb8c119a653b2730e938","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/fat/nfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.10"},{"lessThan":"3.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfat: release buffer head after rebuilding parent\n\nfat_scan_logstart() leaves the matching directory entry's buffer head in\nsinfo.bh for the caller to release, just like fat_scan().\n\nfat_rebuild_parent() uses the directory entry to rebuild the parent inode\nfor the nostale_ro NFS export path, but does not release sinfo.bh after a\nsuccessful scan.  Release it once fat_build_inode() has consumed the\ndirectory entry data."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:36.174Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee"},{"url":"https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826"},{"url":"https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"},{"url":"https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3"},{"url":"https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a"},{"url":"https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755"},{"url":"https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1"},{"url":"https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"}],"title":"fat: release buffer head after rebuilding parent","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90318","datePublished":"2026-09-17T16:08:36.174Z","dateReserved":"2026-09-11T19:38:34.801Z","dateUpdated":"2026-09-17T16:08:36.174Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:29","lastModifiedDate":"2026-09-17 17:17:29","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90318","Ordinal":"1","Title":"fat: release buffer head after rebuilding parent","CVE":"CVE-2026-90318","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90318","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfat: release buffer head after rebuilding parent\n\nfat_scan_logstart() leaves the matching directory entry's buffer head in\nsinfo.bh for the caller to release, just like fat_scan().\n\nfat_rebuild_parent() uses the directory entry to rebuild the parent inode\nfor the nostale_ro NFS export path, but does not release sinfo.bh after a\nsuccessful scan.  Release it once fat_build_inode() has consumed the\ndirectory entry data.","Type":"Description","Title":"fat: release buffer head after rebuilding parent"}]}}}