CVE-2026-89484

CVE CVE-2026-89484EUVD EUVD-2026-76390Published 2026-09-11T19:43:38.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.3-rc1; patch: 6.18.50; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51af080ca4e553256c59a75a877b9b4fff828311; 2.6.12; patch: 0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c7fc129db061c7daab841c4f3c342d894832362; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07adfbb3de7529f58ca708a97ead7fa4fdb71056; patch: 6.12.109; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d662f7fc04fde305a27f304b3cd19b614d366839; patch: 7.2.4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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