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CVE-2022-50404· NVD / CVE Program· CNA Linux

fbdev: fbcon: release buffer when fbcon_do_set_font() failed

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: 0.16% (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 06926607b9fddf7ce8017493899ce6eb7e79a123, 3c3bfb8586f848317ceba5d777e11204ba3e5758, 5.15.86.

Low priority for now. Upgrade to Linux Linux 06926607b9fddf7ce8017493899ce6eb7e79a123, 3c3bfb8586f848317ceba5d777e11204ba3e5758, 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: fbdev: fbcon: release buffer when fbcon_do_set_font() failed syzbot is reporting memory leak at fbcon_do_set_font() [1], for commit a5a923038d70 ("fbdev: fbcon: Properly revert changes when vc_resize() failed") missed that the buffer might be newly allocated by fbcon_set_font().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 18, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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

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

Follow CVE-2022-50404

When you'll hear from us

  • when it enters CISA KEV
  • 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.

VendorProduct
linuxlinux kernel

Affected versions

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

  • linux linux kernel5.15.64 and later · before 5.15.86
  • linux linux kernel5.19.6 and later · before 6.0
  • linux linux kernel6.0.1 and later · before 6.0.16
  • linux linux kernel6.1 and later · before 6.1.2
  • linux linux kernel6.0

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

    • f08ccb792d3eaf1dc62d8cbf6a30d6522329f660, 6.0affected
    • 868749a7456dc48e93887a8474194e2ee6d6c21f and later · before 5a341810a22e51c3a7a108f7896b5fd58d44d127affected · git
    • ebd6f886aa2447fcfcdce5450c9e1028e1d681bb and later · before 88ec6d11052da527eb9268831e7a9bc5bbad02f6affected · git
    • a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 and later · before 06926607b9fddf7ce8017493899ce6eb7e79a123affected · git
    • a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 and later · before a609bfc1e644a8467cb31945ed1488374ebdc013affected · git
    • a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 and later · before 3c3bfb8586f848317ceba5d777e11204ba3e5758affected · git
    • 5.15.64 and later · before 5.15.86affected · semver
    • 5.19.6 and later · before 5.20affected · semver
    • before 6.0not affected · semver
    • 5.15.86 and later · up to and including 5.15.*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-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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-50401Sep 18, 2025 · nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
    31Monitor
  • ← EarlierCVE-2022-50402Sep 18, 2025 · drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()
    22Monitor
  • Later →CVE-2022-50405Sep 18, 2025 · net/tunnel: wait until all sk_user_data reader finish before releasing the sock
    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 / packageFixed versionSource
Linux Linux06926607b9fddf7ce8017493899ce6eb7e79a123Vendor (CNA)
Linux Linux3c3bfb8586f848317ceba5d777e11204ba3e5758Vendor (CNA)
Linux Linux5.15.86Vendor (CNA)
Linux Linux5.20Vendor (CNA)
Linux Linux5a341810a22e51c3a7a108f7896b5fd58d44d127Vendor (CNA)
Linux Linux88ec6d11052da527eb9268831e7a9bc5bbad02f6Vendor (CNA)
Linux Linuxa609bfc1e644a8467cb31945ed1488374ebdc013Vendor (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.

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)

CWE-401 · Missing Release of Memory after Effective Lifetime

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

  1. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records