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VulnerabilityPublished Updated

CVE-2026-43243: Linux kernel · drm/amd/display: Add signal type check for dcn401 get_phyd32clk_src

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e332112255afbce02db67760f5743a1b13aa8541 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 15:50 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in e332112255afbce02db67760f5743a1b13aa8541, c979d8db7b0f293111f2e83795ea353c8ed75de9, 486b2909ac284185900c06f05ffc6eca895f38b8 +1

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade Linux kernel to e332112255afbce02db67760f5743a1b13aa8541, c979d8db7b0f293111f2e83795ea353c8ed75de9, 486b2909ac284185900c06f05ffc6eca895f38b8 or 23e7150afc70da615857f9f07b494ec58540f096.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 70839da6360500a82e4d5f78499284474cbed7c1, < e332112255afbce02db67760f5743a1b13aa8541
Fixed in
  • e332112255afbce02db67760f5743a1b13aa8541
LinuxLinuxAffected
  • ≥ 70839da6360500a82e4d5f78499284474cbed7c1, < c979d8db7b0f293111f2e83795ea353c8ed75de9
Fixed in
  • c979d8db7b0f293111f2e83795ea353c8ed75de9
LinuxLinuxAffected
  • ≥ 70839da6360500a82e4d5f78499284474cbed7c1, < 486b2909ac284185900c06f05ffc6eca895f38b8
Fixed in
  • 486b2909ac284185900c06f05ffc6eca895f38b8
LinuxLinuxAffected
  • ≥ 70839da6360500a82e4d5f78499284474cbed7c1, < 23e7150afc70da615857f9f07b494ec58540f096
Fixed in
  • 23e7150afc70da615857f9f07b494ec58540f096
LinuxLinuxAffected
  • =6.11
Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel. Users should update to the patched kernel version 6.11 or later containing the fix identified by commits e332112255afbce02db67760f5743a1b13aa8541, c979d8db7b0f293111f2e83795ea353c8ed75de9, 486b2909ac284185900c06f05ffc6eca895f38b8, and 23e7150afc70da615857f9f07b494ec58540f096.

Description

A vulnerability in the Linux kernel's AMD display driver (dcn401) was fixed by adding a signal type check in the get_phyd32clk_src function. Without this check, attempting to access the link encoder on a DPIA link could cause the system to crash.

References

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