CVE-2026-89484lockd: fix NULL dereference on lockowner allocation failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 07adfbb3de7529f58ca708a97ead7fa4fdb71056; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d662f7fc04fde305a27f304b3cd19b614d366839; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 51af080ca4e553256c59a75a877b9b4fff828311; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4c7fc129db061c7daab841c4f3c342d894832362 | CNA record |
References
- https://git.kernel.org/stable/c/07adfbb3de7529f58ca708a97ead7fa4fdb71056
- https://git.kernel.org/stable/c/d662f7fc04fde305a27f304b3cd19b614d366839
- https://git.kernel.org/stable/c/51af080ca4e553256c59a75a877b9b4fff828311
- https://git.kernel.org/stable/c/4c7fc129db061c7daab841c4f3c342d894832362
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.