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fat: release buffer head after rebuilding parent

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-90318

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-90318

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "5e44b6944e11fd6647f028219ad0be4e85e9acee",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "d2a86329152c69a6200c15b2bf618755f8563826",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "0f18d712ba9c980e05b7e33a27cde4fe3ed2d393",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "e38587d98d1ceac608420052c0cdd901d25878f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "c6a67aa438179cad40f8ae45469e304338d65c0a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "571ea4263d69df1b48578e4314a828ecd0604755",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "7565e44507634514e3e1899d3acad3de43f7a2c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f1e6fb0ab451dae8523fbb8c119a653b2730e938",
        "lessThan": "83e98dbf19ab64e8528e101e20f8d50e1aaa68a8",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/fat/nfs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/fat/nfs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90318

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36669 · Revision 1
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Publisher date
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