CVE-2026-43243: Linux kernel · drm/amd/display: Add signal type check for dcn401 get_phyd32clk_src
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e332112255afbce02db67760f5743a1b13aa8541 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 15:50 UTC
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
Disclosed: evidence found.
CVE published 6 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| 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
- git.kernel.org/stable/c/23e7150afc70da615857f9f07b494ec58540f096 (opens in a new tab)
- git.kernel.org/stable/c/486b2909ac284185900c06f05ffc6eca895f38b8 (opens in a new tab)
- git.kernel.org/stable/c/e332112255afbce02db67760f5743a1b13aa8541 (opens in a new tab)
- git.kernel.org/stable/c/c979d8db7b0f293111f2e83795ea353c8ed75de9 (opens in a new tab)