CVE-2026-23223 (GCVE-0-2026-23223)

Vulnerability from cvelistv5 – Published: 2026-02-18 14:53 – Updated: 2026-02-18 14:53
VLAI?
Title
xfs: fix UAF in xchk_btree_check_block_owner
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1d411278dda293a507cb794db7d9ed3511c685c6 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ed82e7949f5cac3058f4100f3cd670531d41a266 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ba5264610423d9653aa36920520902d83841bcfd (git)
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    Linux Linux Unaffected: 6.12.72 , ≤ 6.12.* (semver)
Unaffected: 6.18.11 , ≤ 6.18.* (semver)
Unaffected: 6.19.1 , ≤ 6.19.* (semver)
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          "programFiles": [
            "fs/xfs/scrub/btree.c"
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          "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."
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        "dateUpdated": "2026-02-18T14:53:26.603Z",
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        "shortName": "Linux"
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    "cveId": "CVE-2026-23223",
    "datePublished": "2026-02-18T14:53:26.603Z",
    "dateReserved": "2026-01-13T15:37:45.987Z",
    "dateUpdated": "2026-02-18T14:53:26.603Z",
    "state": "PUBLISHED"
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  }
}


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