github - ghsa-9rf3-hx86-5f4p

GHSA-9RF3-HX86-5F4P

Vulnerability from github – Published: 2025-12-24 15:30 – Updated: 2025-12-24 15:30

Details

In the Linux kernel, the following vulnerability has been resolved:

erofs: validate the extent length for uncompressed pclusters

syzkaller reported a KASAN use-after-free: https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2

The referenced fuzzed image actually has two issues: - m_pa == 0 as a non-inlined pcluster; - The logical length is longer than its physical length.

The first issue has already been addressed. This patch addresses the second issue by checking the extent length validity.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50746"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: validate the extent length for uncompressed pclusters\n\nsyzkaller reported a KASAN use-after-free:\nhttps://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2\n\nThe referenced fuzzed image actually has two issues:\n - m_pa == 0 as a non-inlined pcluster;\n - The logical length is longer than its physical length.\n\nThe first issue has already been addressed.  This patch addresses\nthe second issue by checking the extent length validity.",
  "id": "GHSA-9rf3-hx86-5f4p",
  "modified": "2025-12-24T15:30:33Z",
  "published": "2025-12-24T15:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50746"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40c73b2ea9611b5388807be406f30f5e4e1162da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c505feba4c0d76084e56ec498ce819f02a7043ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2022-50746 (GCVE-0-2022-50746)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2025-12-24 13:05

Title

erofs: validate the extent length for uncompressed pclusters

Summary

In the Linux kernel, the following vulnerability has been resolved: erofs: validate the extent length for uncompressed pclusters syzkaller reported a KASAN use-after-free: https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2 The referenced fuzzed image actually has two issues: - m_pa == 0 as a non-inlined pcluster; - The logical length is longer than its physical length. The first issue has already been addressed. This patch addresses the second issue by checking the extent length validity.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/dc8b6bd587b13b85a…
	https://git.kernel.org/stable/c/40c73b2ea9611b538…
	https://git.kernel.org/stable/c/c505feba4c0d76084…

Impacted products

Vendor

Product

Version

Linux

Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e (git)
Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < 40c73b2ea9611b5388807be406f30f5e4e1162da (git)
Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < c505feba4c0d76084e56ec498ce819f02a7043ae (git)

Linux

Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/zmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e",
              "status": "affected",
              "version": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
              "versionType": "git"
            },
            {
              "lessThan": "40c73b2ea9611b5388807be406f30f5e4e1162da",
              "status": "affected",
              "version": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
              "versionType": "git"
            },
            {
              "lessThan": "c505feba4c0d76084e56ec498ce819f02a7043ae",
              "status": "affected",
              "version": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/zmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.16",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.2",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: validate the extent length for uncompressed pclusters\n\nsyzkaller reported a KASAN use-after-free:\nhttps://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2\n\nThe referenced fuzzed image actually has two issues:\n - m_pa == 0 as a non-inlined pcluster;\n - The logical length is longer than its physical length.\n\nThe first issue has already been addressed.  This patch addresses\nthe second issue by checking the extent length validity."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T13:05:42.628Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/40c73b2ea9611b5388807be406f30f5e4e1162da"
        },
        {
          "url": "https://git.kernel.org/stable/c/c505feba4c0d76084e56ec498ce819f02a7043ae"
        }
      ],
      "title": "erofs: validate the extent length for uncompressed pclusters",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50746",
    "datePublished": "2025-12-24T13:05:42.628Z",
    "dateReserved": "2025-12-24T13:02:21.543Z",
    "dateUpdated": "2025-12-24T13:05:42.628Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9RF3-HX86-5F4P

CVE-2022-50746 (GCVE-0-2022-50746)

Tags

Sightings

Nomenclature