CVE-2026-90318 (GCVE-0-2026-90318)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-10-19 09:01
VLAI
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < 5e44b6944e11fd6647f028219ad0be4e85e9acee (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < d2a86329152c69a6200c15b2bf618755f8563826 (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393 (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < e38587d98d1ceac608420052c0cdd901d25878f3 (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < c6a67aa438179cad40f8ae45469e304338d65c0a (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < 571ea4263d69df1b48578e4314a828ecd0604755 (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < 7565e44507634514e3e1899d3acad3de43f7a2c1 (git)
Affected: f1e6fb0ab451dae8523fbb8c119a653b2730e938 , < 83e98dbf19ab64e8528e101e20f8d50e1aaa68a8 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "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\u0027s 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."
        }
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      "providerMetadata": {
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    "dateReserved": "2026-09-11T19:38:34.801Z",
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      "current_release_date": "2026-10-05T16:19:29+00:00",
      "cve": "CVE-2026-90318",
      "id": "CVE-2026-90318",
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      "product_status:known_affected": "263",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fat: release buffer head after rebuilding parent",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90318.json",
      "version": "3"
    }
  }
}



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