NVD / CVE Program· CNA Linux

CVE-2022-50302: lockd: set other missing fields when unlocking files

Noroxi assessment

Priority: Monitor (action score 22/100)

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: 0.36% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 18ebd35b61b4693a0ddc270b6d4f18def232e770, 31c93ee5f1e4dc278b562e20f3c3274ac34997f3, 5.15.86.
Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 18ebd35b61b4693a0ddc270b6d4f18def232e770, 31c93ee5f1e4dc278b562e20f3c3274ac34997f3, 5.15.86 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: set other missing fields when unlocking files vfs_lock_file() expects the struct file_lock to be fully initialised by the caller. Re-exported NFSv3 has been seen to Oops if the fl_file field is NULL.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

BDU:2026-02523

Published: Sep 15, 2025
Updated: Aug 5, 2026
EPSS: 0.3% · 30th percentile
CWE: —

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CNA vs NVD score

NVD: 5.5
CNA · Linux: 7.5; 2.0 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

If any of these changes, we'll tell you in the daily email digest.

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel5.15.56 and later · before 5.15.86
linux linux kernel5.18.13 and later · before 5.19
linux linux kernel5.19.1 and later · before 6.0.16
linux linux kernel6.1 and later · before 6.1.2
linux linux kernel5.19

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
- 58c3f48a540b821b3253e2dc31c8fa237293ffc9, 5.19affected
- 486c1acf14233b1ff7b37e6f026a737a2f7f53f1 and later · before 31c93ee5f1e4dc278b562e20f3c3274ac34997f3affected · git
- 9c3eef773cf4a8a18f959234bbb4c0a55c31ab71 and later · before 95d42a8d3d4ae84a0bd3ee23e1fee240cdf0a9f0affected · git
- aec158242b87a43d83322e99bc71ab4428e5ab79 and later · before 688575aef211b0986fc51010116f5888a99d76a2affected · git
- aec158242b87a43d83322e99bc71ab4428e5ab79 and later · before d7aa9f7778316beb690f6e2763b6d672ad8b256faffected · git
- aec158242b87a43d83322e99bc71ab4428e5ab79 and later · before 18ebd35b61b4693a0ddc270b6d4f18def232e770affected · git
- 5.15.56 and later · before 5.15.86affected · semver
- 5.18.13 and later · before 5.19affected · semver
- before 5.19not affected · semver
- 5.15.86 and later · up to and including 5.15.*not affected · semver

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2022-50300Sep 15, 2025 · btrfs: fix extent map use-after-free when handling missing device in read_one_chunk
31Monitor
← EarlierCVE-2022-50301Sep 15, 2025 · iommu/omap: Fix buffer overflow in debugfs
31Monitor
Later →CVE-2022-50304Sep 15, 2025 · mtd: core: fix possible resource leak in init_mtd()
22Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Linux Linux	18ebd35b61b4693a0ddc270b6d4f18def232e770	Vendor (CNA)
Linux Linux	31c93ee5f1e4dc278b562e20f3c3274ac34997f3	Vendor (CNA)
Linux Linux	5.15.86	Vendor (CNA)
Linux Linux	5.19	Vendor (CNA)
Linux Linux	688575aef211b0986fc51010116f5888a99d76a2	Vendor (CNA)
Linux Linux	95d42a8d3d4ae84a0bd3ee23e1fee240cdf0a9f0	Vendor (CNA)
Linux Linux	d7aa9f7778316beb690f6e2763b6d672ad8b256f	Vendor (CNA)

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

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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

References

git.kernel.org/stable/c/18ebd35b61b4693a0ddc270b6d4f18def232e770

Show all references (4 more)

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

All records