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NVD / CVE Program· CNA Linux

CVE-2022-50767: fbdev: smscufx: Fix several use-after-free bugs

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: 0.25% (FIRST EPSS).
  • Fixed version: Linux Linux 3f40852d671072836fb7ae331a1f28a24223c4e8, 5385af2f89bc352fb70753ab41b2bb036190141f, 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f.

Low priority for now. Upgrade to Linux Linux 3f40852d671072836fb7ae331a1f28a24223c4e8, 5385af2f89bc352fb70753ab41b2bb036190141f, 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f 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: fbdev: smscufx: Fix several use-after-free bugs Several types of UAFs can occur when physically removing a USB device. Adds ufx_ops_destroy() function to .fb_destroy of fb_ops, and in this function, there is kref_put() that finally calls ufx_free(). This fix prevents multiple UAFs.

—No exploit Fix available
Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 16th 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 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

    • 3.2affected
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953faffected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before 3f40852d671072836fb7ae331a1f28a24223c4e8affected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before 70faf9d9b6cc74418716bbf76fe75bd2da10ad4aaffected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before 5385af2f89bc352fb70753ab41b2bb036190141faffected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before d9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86affected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before cc6a7249842fceda7574ceb63275a2d5e99d2862affected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before 8d924b262f3178a9b17c17d4306a9f426c508bd9affected · git
    • 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 and later · before cc67482c9e5f2c80d62f623bcc347c29f9f648e1affected · git
    • before 3.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.7-16.0.7-1

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-2022-50765Dec 24, 2025 · RISC-V: kexec: Fix memory leak of elf header buffer
    0Monitor
  • ← EarlierCVE-2022-50766Dec 24, 2025 · btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer
    0Monitor
  • Later →CVE-2022-50768Dec 24, 2025 · scsi: smartpqi: Correct device removal for multi-actuator devices
    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 Linux3f40852d671072836fb7ae331a1f28a24223c4e8Vendor (CNA)
Linux Linux5385af2f89bc352fb70753ab41b2bb036190141fVendor (CNA)
Linux Linux6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953fVendor (CNA)
Linux Linux70faf9d9b6cc74418716bbf76fe75bd2da10ad4aVendor (CNA)
Linux Linux8d924b262f3178a9b17c17d4306a9f426c508bd9Vendor (CNA)
Linux Linuxcc67482c9e5f2c80d62f623bcc347c29f9f648e1Vendor (CNA)
Linux Linuxcc6a7249842fceda7574ceb63275a2d5e99d2862Vendor (CNA)
Linux Linuxd9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86Vendor (CNA)
debian:linux6.0.7-1 · 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 (7 more)

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

All records