{"id":"CVE-2026-90318","summary":"fat: release buffer head after rebuilding parent","details":"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.","modified":"2026-09-19T03:47:28.878474249Z","published":"2026-09-17T16:08:36.174Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"},{"type":"WEB","url":"https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90318"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f1e6fb0ab451dae8523fbb8c119a653b2730e938"},{"fixed":"5e44b6944e11fd6647f028219ad0be4e85e9acee"},{"fixed":"d2a86329152c69a6200c15b2bf618755f8563826"},{"fixed":"0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"},{"fixed":"e38587d98d1ceac608420052c0cdd901d25878f3"},{"fixed":"c6a67aa438179cad40f8ae45469e304338d65c0a"},{"fixed":"571ea4263d69df1b48578e4314a828ecd0604755"},{"fixed":"7565e44507634514e3e1899d3acad3de43f7a2c1"},{"fixed":"83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90318.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90318.json"}}],"schema_version":"1.9.0"}