Not yet scoredPublished Aug 15, 2026

CVE-2026-72218lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure

Updated under an hour ago (Oct 28, 2026, 12:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure The cached-file path in nlm_lookup_file() reaches the found: label unconditionally, even when nlm_do_fopen() fails. At that label *result and file->f_count are updated before the error is returned. The wrappers nlm3svc_lookup_file() and nlm4svc_lookup_file() then bail out of their switch without copying *result back to their caller, so the proc handler's local nlm_file pointer remains NULL and the cleanup path skips nlm_release_file(). The f_count increment is never released, and nlm_traverse_files() can no longer reap the file because its refcount never returns to zero between requests. Short-circuit the cached path so neither *result nor f_count is touched when nlm_do_fopen() fails on a hashed nlm_file.

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: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e580323ac0b51ad10ec2e181d1f777479b7983e7 before 6cd84cefd8b73e85b9eda17b319bd40a670f3a38; from 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 before fe3b45b56b6c3d4b6b341de27fa291005287a21c; from 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 before cb3420c047957e565101585bb4f15e1a6e3de6b0; 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 builds before 7ce4c23e783e766507b2cef27bbf97e9ca944f1a; from 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 before 84008bf1860e0ef8059a7583a1163f36b704d08a; from 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 before 46d59ff421824b6483549d87f14efffbbbd1f6cb; 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 builds before 3a5c55a19cad62f2973be25fe96a1a9e7f618e8a; from 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 before 70a38f87bed7f0694fd07988b47b2db1e10d8df3; and 1 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/6cd84cefd8b73e85b9eda17b319bd40a670f3a38
https://git.kernel.org/stable/c/fe3b45b56b6c3d4b6b341de27fa291005287a21c
https://git.kernel.org/stable/c/cb3420c047957e565101585bb4f15e1a6e3de6b0
https://git.kernel.org/stable/c/7ce4c23e783e766507b2cef27bbf97e9ca944f1a
https://git.kernel.org/stable/c/84008bf1860e0ef8059a7583a1163f36b704d08a
https://git.kernel.org/stable/c/46d59ff421824b6483549d87f14efffbbbd1f6cb
https://git.kernel.org/stable/c/3a5c55a19cad62f2973be25fe96a1a9e7f618e8a
https://git.kernel.org/stable/c/70a38f87bed7f0694fd07988b47b2db1e10d8df3

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.