HOMEVULNERABILITIESCVE-2026-43123
MEDIUM

CVE-2026-43123

Published: May 6, 2026· Updated: May 12, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:7.0th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

fbcon: check return value of con2fb_acquire_newinfo()

If fbcon_open() fails when called from con2fb_acquire_newinfo() then

info->fbcon_par pointer remains NULL which is later dereferenced.

Add check for return value of the function con2fb_acquire_newinfo() to

avoid it.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

NVD Source

Technical Analysis

CVE-2026-43123 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544
PATCHhttps://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc
PATCHhttps://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959
PATCHhttps://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c
PATCHhttps://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c
PATCHhttps://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f
PATCHhttps://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89

All References (7)

→
https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544Patch
→
https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9ccPatch
→
https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959Patch
→
https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0cPatch
→
https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2cPatch
→
https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59fPatch
→
https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89Patch

Quick Facts

CVE IDCVE-2026-43123
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 6, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-43123 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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