CVE-2026-89484 (GCVE-0-2026-89484)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-10-30 12:31
VLAI
Title
lockd: fix NULL dereference on lockowner allocation failure
Summary
In the Linux kernel, the following vulnerability has been resolved: lockd: fix NULL dereference on lockowner allocation failure nlmclnt_locks_init_private() installs NLM file lock operations even when nlmclnt_find_lockowner() fails to allocate a lockowner. nlmclnt_proc() then returns -ENOMEM, but the VFS still tears down the partially initialized file_lock and calls locks_release_private(). That invokes nlmclnt_locks_release_private(), which dereferences fl->fl_u.nfs_fl.owner and crashes because the owner was never installed. Clear fl_ops before attempting to initialize the NLM private state, and install the NLM lock operations only after a lockowner has been allocated successfully.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6847 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b61053a3795c2913a7af3ab6218acfdaf52fcafe (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6db5af172ccc3223c8f730a9a4212f6427feee3e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 07adfbb3de7529f58ca708a97ead7fa4fdb71056 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d662f7fc04fde305a27f304b3cd19b614d366839 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 51af080ca4e553256c59a75a877b9b4fff828311 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4c7fc129db061c7daab841c4f3c342d894832362 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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        "metrics": {},
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      "cve": "CVE-2026-89484",
      "id": "CVE-2026-89484",
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      "product_status:known_affected": "186",
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}



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