CVE-2026-64146 (GCVE-0-2026-64146)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40
VLAI
Title
erofs: fix metabuf leak in inode xattr initialization
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: fix metabuf leak in inode xattr initialization commit bb88e8da0025 ("erofs: use meta buffers for xattr operations") converted xattr operations to use on-stack erofs_buf instances. erofs_init_inode_xattrs() uses such a metabuf while reading the inline xattr header and shared xattr id array. Some error paths after erofs_read_metabuf() leave through out_unlock without dropping the metabuf, so the folio reference can leak. Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a no-op if no folio has been acquired, and this keeps all paths after taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bb88e8da00253bea0e7f0f4cdfd7910572d7799f , < 492c73b21fefa36f3869cb2b188ffb7fe37b3a9b (git)
Affected: bb88e8da00253bea0e7f0f4cdfd7910572d7799f , < 79b09c54c6563df9846ca3094bcfd72082c3e1d7 (git)
Create a notification for this product.
Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "492c73b21fefa36f3869cb2b188ffb7fe37b3a9b",
              "status": "affected",
              "version": "bb88e8da00253bea0e7f0f4cdfd7910572d7799f",
              "versionType": "git"
            },
            {
              "lessThan": "79b09c54c6563df9846ca3094bcfd72082c3e1d7",
              "status": "affected",
              "version": "bb88e8da00253bea0e7f0f4cdfd7910572d7799f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/xattr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix metabuf leak in inode xattr initialization\n\ncommit bb88e8da0025 (\"erofs: use meta buffers for xattr operations\")\nconverted xattr operations to use on-stack erofs_buf instances.\nerofs_init_inode_xattrs() uses such a metabuf while reading the inline\nxattr header and shared xattr id array.\n\nSome error paths after erofs_read_metabuf() leave through out_unlock\nwithout dropping the metabuf, so the folio reference can leak.\n\nConsolidate the cleanup at out_unlock. erofs_put_metabuf() is a\nno-op if no folio has been acquired, and this keeps all paths after\ntaking EROFS_I_BL_XATTR_BIT covered by a single cleanup site."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:40:37.474Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7"
        }
      ],
      "title": "erofs: fix metabuf leak in inode xattr initialization",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64146",
    "datePublished": "2026-07-19T15:40:37.474Z",
    "dateReserved": "2026-07-19T07:54:57.037Z",
    "dateUpdated": "2026-07-19T15:40:37.474Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64146",
      "date": "2026-07-21",
      "epss": "0.00162",
      "percentile": "0.05846"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-21T01:05:10.000Z",
      "cve": "CVE-2026-64146",
      "id": "msrc_CVE-2026-64146",
      "initial_release_date": "2026-07-21T01:05:10.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "erofs: fix metabuf leak in inode xattr initialization",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64146.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64146\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:17:56.547\",\"lastModified\":\"2026-07-19T16:17:56.547\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nerofs: fix metabuf leak in inode xattr initialization\\n\\ncommit bb88e8da0025 (\\\"erofs: use meta buffers for xattr operations\\\")\\nconverted xattr operations to use on-stack erofs_buf instances.\\nerofs_init_inode_xattrs() uses such a metabuf while reading the inline\\nxattr header and shared xattr id array.\\n\\nSome error paths after erofs_read_metabuf() leave through out_unlock\\nwithout dropping the metabuf, so the folio reference can leak.\\n\\nConsolidate the cleanup at out_unlock. erofs_put_metabuf() is a\\nno-op if no folio has been acquired, and this keeps all paths after\\ntaking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/erofs/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"bb88e8da00253bea0e7f0f4cdfd7910572d7799f\",\"lessThan\":\"492c73b21fefa36f3869cb2b188ffb7fe37b3a9b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bb88e8da00253bea0e7f0f4cdfd7910572d7799f\",\"lessThan\":\"79b09c54c6563df9846ca3094bcfd72082c3e1d7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/erofs/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T07:52:25+00:00",
      "cve": "CVE-2026-64146",
      "id": "CVE-2026-64146",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: erofs: fix metabuf leak in inode xattr initialization",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64146.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
  • 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.