UnratedFix available
fat: release buffer head after rebuilding parent
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: fat: release buffer head after rebuilding parent fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
- CVEs
- CVE-2026-90318
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:50 UTC · Revision 1
Source evidence
fat: release buffer head after rebuilding parent
core-osv · Original sourcePublished 17 Sept 2026, 16:08 UTC
In the Linux kernel, the following vulnerability has been resolved: fat: release buffer head after rebuilding parent fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data.
osv:CVE-2026-90318
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6
Complete source record
{
"id": "b662c5422decb21f5b4d249d753b490d2ba88adec6306166cbd8856ffd36bf4c",
"url": "https://osv.dev/vulnerability/CVE-2026-90318",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "fat: release buffer head after rebuilding parent",
"summary": "In the Linux kernel, the following vulnerability has been resolved: fat: release buffer head after rebuilding parent fat_scan_logstart() leaves the matching directory entry's buffer head in sinfo.bh for the caller to release, just like fat_scan(). fat_rebuild_parent() uses the directory entry to rebuild the parent inode for the nostale_ro NFS export path, but does not release sinfo.bh after a successful scan. Release it once fat_build_inode() has consumed the directory entry data.",
"evidence": "osv:CVE-2026-90318",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
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"prerequisites": [],
"fixed_versions": [
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"value": "5.10.270",
"evidence": "/affected/1/ranges"
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{
"value": "5.15.221",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.188",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.110",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.52",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.6",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-90318",
"aliases": [
"CVE-2026-90318"
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"affected": [
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{
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90318.json"
}
},
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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"introduced": "3.10.0"
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{
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{
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"events": [
{
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{
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},
{
"type": "ECOSYSTEM",
"events": [
{
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{
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],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90318.json"
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],
"modified": "2026-10-28T02:30:37.508078770Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393",
"https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755",
"https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee",
"https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1",
"https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8",
"https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a",
"https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826",
"https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-90318",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json"
}
},
"related_cves": [
{
"value": "CVE-2026-90318",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 504925,
"published_at": "2026-09-17T16:08:36.174+00:00"
}