CVE-2026-23223 (GCVE-0-2026-23223)
Vulnerability from cvelistv5
Published
2026-02-18 14:53
Modified
2026-04-13 06:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed. Fix this by sampling before type before any freeing could happen. The correct temporal ordering was broken when we removed xfs_btnum_t.
References
Impacted products
Vendor Product Version
Linux Linux Version: ec793e690f801d97a7ae2a0d429fea1fee4d44aa
Version: ec793e690f801d97a7ae2a0d429fea1fee4d44aa
Version: ec793e690f801d97a7ae2a0d429fea1fee4d44aa
Version: ec793e690f801d97a7ae2a0d429fea1fee4d44aa
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/scrub/btree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1d411278dda293a507cb794db7d9ed3511c685c6",
              "status": "affected",
              "version": "ec793e690f801d97a7ae2a0d429fea1fee4d44aa",
              "versionType": "git"
            },
            {
              "lessThan": "ed82e7949f5cac3058f4100f3cd670531d41a266",
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              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/scrub/btree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.72",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.72",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.11",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix UAF in xchk_btree_check_block_owner\n\nWe cannot dereference bs-\u003ecur when trying to determine if bs-\u003ecur\naliases bs-\u003esc-\u003esa.{bno,rmap}_cur after the latter has been freed.\nFix this by sampling before type before any freeing could happen.\nThe correct temporal ordering was broken when we removed xfs_btnum_t."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:02:38.635Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfd"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c253e11225bc5167217897885b85093e17c2217"
        }
      ],
      "title": "xfs: fix UAF in xchk_btree_check_block_owner",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23223",
    "datePublished": "2026-02-18T14:53:26.603Z",
    "dateReserved": "2026-01-13T15:37:45.987Z",
    "dateUpdated": "2026-04-13T06:02:38.635Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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