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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 1161c4b5bd0048c8148e919f818a33cff3623ef0, 1403f1221a35a6caf959bb7bf005741f17263c66, 39f59bf67231ed2eb0cdf6337194360e964b609a.

Low priority for now. Upgrade to Linux Linux 1161c4b5bd0048c8148e919f818a33cff3623ef0, 1403f1221a35a6caf959bb7bf005741f17263c66, 39f59bf67231ed2eb0cdf6337194360e964b609a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2026-72219

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.15affected
    • e580323ac0b51ad10ec2e181d1f777479b7983e7 and later · before bca74fff138429f3d5802865f38fc883d53a4f1aaffected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before d7c677feb3aa1f42b1026d75a8ea61338b51e4fbaffected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before 39f59bf67231ed2eb0cdf6337194360e964b609aaffected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before ddfbd816273b4e9c9b836f5b8773664c6f40f807affected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before 1403f1221a35a6caf959bb7bf005741f17263c66affected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before 1161c4b5bd0048c8148e919f818a33cff3623ef0affected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before 3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9affected · git
    • 7f024fcd5c97dc70bb9121c80407cf3cf9be7159 and later · before f16a1513452edb532fec81e591c64c320866719caffected · git
    • 5.10.220 and later · before 5.10.261affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-72213Aug 15, 2026 · mm/hugetlb: fix hugetlb cgroup rsvd charge/uncharge mismatch
    28Monitor
  • ← EarlierCVE-2026-72218Aug 15, 2026 · lockd: Plug nlm_file refcount leak on cached nlm_do_fopen() failure
    0Monitor
  • Later →CVE-2026-72221Aug 15, 2026 · sunrpc: wait for in-flight TLS handshake callback when cancel loses race
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1161c4b5bd0048c8148e919f818a33cff3623ef0Vendor (CNA)
Linux Linux1403f1221a35a6caf959bb7bf005741f17263c66Vendor (CNA)
Linux Linux39f59bf67231ed2eb0cdf6337194360e964b609aVendor (CNA)
Linux Linux3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9Vendor (CNA)
Linux Linux5.10.261Vendor (CNA)
Linux Linuxbca74fff138429f3d5802865f38fc883d53a4f1aVendor (CNA)
Linux Linuxd7c677feb3aa1f42b1026d75a8ea61338b51e4fbVendor (CNA)
Linux Linuxddfbd816273b4e9c9b836f5b8773664c6f40f807Vendor (CNA)
Linux Linuxf16a1513452edb532fec81e591c64c320866719cVendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records