CVE-2022-50746 (GCVE-0-2022-50746)
Vulnerability from cvelistv5
Published
2025-12-24 13:05
Modified
2025-12-24 13:05
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 02827e1796b33f1794966f5c3101f8da2dfa9c1d
Version: 02827e1796b33f1794966f5c3101f8da2dfa9c1d
Version: 02827e1796b33f1794966f5c3101f8da2dfa9c1d
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "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",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50746\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:01.313\",\"lastModified\":\"2025-12-24T13:16:01.313\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/40c73b2ea9611b5388807be406f30f5e4e1162da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c505feba4c0d76084e56ec498ce819f02a7043ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.