CVE-2026-72218lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
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
- 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.