Vulnerability-Lookup

FKIE_CVE-2026-90318

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17

Severity

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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\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."
    }
  ],
  "id": "CVE-2026-90318",
  "lastModified": "2026-09-17T17:17:29.683",
  "metrics": {},
  "published": "2026-09-17T17:17:29.683",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

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

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08

Title

fat: release buffer head after rebuilding parent

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5e44b6944e11fd664…
https://git.kernel.org/stable/c/d2a86329152c69a62…
https://git.kernel.org/stable/c/0f18d712ba9c980e0…
https://git.kernel.org/stable/c/e38587d98d1ceac60…
https://git.kernel.org/stable/c/c6a67aa438179cad4…
https://git.kernel.org/stable/c/571ea4263d69df1b4…
https://git.kernel.org/stable/c/7565e44507634514e…
https://git.kernel.org/stable/c/83e98dbf19ab64e85…

Impacted products

2 products

Vendor	Product	Version
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)
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-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "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",
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              "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\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."
        }
      ],
      "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2026-90318

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

Tags

Sightings

Nomenclature

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