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NVD / CVE Program· CNA Linux

CVE-2022-50843: dm clone: Fix UAF in clone_dtr()

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: 0.24% (FIRST EPSS).
  • Fixed version: Linux Linux 342cfd8426dff4228e6c714bcb9fc8295a2748dd, 520b56cfd9faee7683f081c3a38f11a81b13a68e, 856edd0e92f3fe89606b704c86a93daedddfe6ec.

Low priority for now. Upgrade to Linux Linux 342cfd8426dff4228e6c714bcb9fc8295a2748dd, 520b56cfd9faee7683f081c3a38f11a81b13a68e, 856edd0e92f3fe89606b704c86a93daedddfe6ec 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: dm clone: Fix UAF in clone_dtr() Dm_clone also has the same UAF problem when dm_resume() and dm_destroy() are concurrent. Therefore, cancelling timer again in clone_dtr().

—No exploit Fix available
Published
Dec 30, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 15th 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%

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  • 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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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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

    • 5.4affected
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before 520b56cfd9faee7683f081c3a38f11a81b13a68eaffected · git
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before 342cfd8426dff4228e6c714bcb9fc8295a2748ddaffected · git
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before 856edd0e92f3fe89606b704c86a93daedddfe6ecaffected · git
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before b1ddb666073bb5f36390aaabaa1a4d48d78c52edaffected · git
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before 9e113cd4f61f3b0000843b2d0a90ce8b40a1fcffaffected · git
    • 7431b7835f554f8608b415a02cf3c3f086309e02 and later · before e4b5957c6f749a501c464f92792f1c8e26b61a94affected · git
    • before 5.4not affected · semver
    • 5.4.229 and later · up to and including 5.4.*not affected · semver
    • 5.10.163 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1

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-2022-50841Dec 30, 2025 · fs/ntfs3: Add overflow check for attribute size
    31Monitor
  • ← EarlierCVE-2022-50842Dec 30, 2025 · drm/virtio: Check whether transferred 2D BO is shmem
    0Monitor
  • Later →CVE-2022-50844Dec 30, 2025 · drm/amdgpu: Fix type of second parameter in odn_edit_dpm_table() callback
    0Monitor

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 Linux342cfd8426dff4228e6c714bcb9fc8295a2748ddVendor (CNA)
Linux Linux520b56cfd9faee7683f081c3a38f11a81b13a68eVendor (CNA)
Linux Linux856edd0e92f3fe89606b704c86a93daedddfe6ecVendor (CNA)
Linux Linux9e113cd4f61f3b0000843b2d0a90ce8b40a1fcffVendor (CNA)
Linux Linuxb1ddb666073bb5f36390aaabaa1a4d48d78c52edVendor (CNA)
Linux Linuxe4b5957c6f749a501c464f92792f1c8e26b61a94Vendor (CNA)
debian:linux6.1.4-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records