# CVE-2026-72219: lockd: Plug nlm_file leak when nlm_do_fopen() fails

Status: published. Published: 2026-08-15. Updated: 2026-11-06.

In the Linux kernel, the following vulnerability has been resolved:

lockd: Plug nlm_file leak when nlm_do_fopen() fails

A client can repeatedly drive nlm_do_fopen() failures by presenting
file handles that the underlying export rejects. After kzalloc_obj()
succeeds in nlm_lookup_file(), the freshly allocated nlm_file is not
yet inserted into nlm_files[]. The nlm_do_fopen() failure path jumps
to out_unlock, which releases nlm_file_mutex and returns without
freeing the allocation, so each failure leaks one nlm_file.

Route the failure through out_free so kfree() runs before the
function returns.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ e580323ac0b51ad10ec2e181d1f777479b7983e7; < bca74fff138429f3d5802865f38fc883d53a4f1a (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < d7c677feb3aa1f42b1026d75a8ea61338b51e4fb (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < 39f59bf67231ed2eb0cdf6337194360e964b609a (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < ddfbd816273b4e9c9b836f5b8773664c6f40f807 (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < 1403f1221a35a6caf959bb7bf005741f17263c66 (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < 1161c4b5bd0048c8148e919f818a33cff3623ef0 (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < 3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9 (affected, git); ≥ 7f024fcd5c97dc70bb9121c80407cf3cf9be7159; < f16a1513452edb532fec81e591c64c320866719c (affected, git); ≥ 5.10.220; < 5.10.261 (affected, semver). Source: CNA: Linux
- Linux / Linux: 5.15 (affected); ≥ 0; < 5.15 (unaffected, semver); ≥ 5.10.261; ≤ 5.10.* (unaffected, semver); ≥ 5.15.212; ≤ 5.15.* (unaffected, semver); ≥ 6.1.178; ≤ 6.1.* (unaffected, semver); ≥ 6.6.145; ≤ 6.6.* (unaffected, semver); ≥ 6.12.97; ≤ 6.12.* (unaffected, semver); ≥ 6.18.40; ≤ 6.18.* (unaffected, semver); ≥ 7.1.5; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.13%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/bca74fff138429f3d5802865f38fc883d53a4f1a (CNA: Linux)

- https://git.kernel.org/stable/c/d7c677feb3aa1f42b1026d75a8ea61338b51e4fb (CNA: Linux)

- https://git.kernel.org/stable/c/39f59bf67231ed2eb0cdf6337194360e964b609a (CNA: Linux)

- https://git.kernel.org/stable/c/ddfbd816273b4e9c9b836f5b8773664c6f40f807 (CNA: Linux)

- https://git.kernel.org/stable/c/1403f1221a35a6caf959bb7bf005741f17263c66 (CNA: Linux)

- https://git.kernel.org/stable/c/1161c4b5bd0048c8148e919f818a33cff3623ef0 (CNA: Linux)

- https://git.kernel.org/stable/c/3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9 (CNA: Linux)

- https://git.kernel.org/stable/c/f16a1513452edb532fec81e591c64c320866719c (CNA: Linux)

- https://git.kernel.org/stable/c/1161c4b5bd0048c8148e919f818a33cff3623ef0 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/1403f1221a35a6caf959bb7bf005741f17263c66 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/39f59bf67231ed2eb0cdf6337194360e964b609a (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/bca74fff138429f3d5802865f38fc883d53a4f1a (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/d7c677feb3aa1f42b1026d75a8ea61338b51e4fb (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/ddfbd816273b4e9c9b836f5b8773664c6f40f807 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f16a1513452edb532fec81e591c64c320866719c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72219; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72219; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72219; retrieved 2026-11-06; source updated Not reported

Revision: e71f295bb86e0dde55bf58544725a4c985e6184bec88830dc06eb667134197ed

Canonical: https://y2.dev/cve/CVE-2026-72219

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