VulnerabilityPublished 26 Jun 2026Updated 21 Oct 2026

CVE-2026-53313: Linux kernel · drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22, a71fdbd6e8289e2725d33a9873833459f3b1824f, 4ae3e16f4b3bf64140f773629b765d605ee079a9 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 26 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2631ac1ac328189031d1aefbbd4929050f72fb23, < b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22	Fixed in b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22
LinuxLinux	Affected ≥ 2631ac1ac328189031d1aefbbd4929050f72fb23, < a71fdbd6e8289e2725d33a9873833459f3b1824f	Fixed in a71fdbd6e8289e2725d33a9873833459f3b1824f
LinuxLinux	Affected ≥ 2631ac1ac328189031d1aefbbd4929050f72fb23, < 4ae3e16f4b3bf64140f773629b765d605ee079a9	Fixed in 4ae3e16f4b3bf64140f773629b765d605ee079a9
LinuxLinux	Affected ≥ 2631ac1ac328189031d1aefbbd4929050f72fb23, < 2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a	Fixed in 2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a
LinuxLinux	Affected ≥ 2631ac1ac328189031d1aefbbd4929050f72fb23, < 1cad9afbb2d559b738b83c498f9c1abdfd327e7f	Fixed in 1cad9afbb2d559b738b83c498f9c1abdfd327e7f
LinuxLinux	Affected =5.14	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths In dc_dmub_srv_log_diagnostic_data() and dc_dmub_srv_enable_dpia_trace(). Both functions check: if (!dc_dmub_srv || !dc_dmub_srv->dmub) and then call DC_LOG_ERROR() inside that block. DC_LOG_ERROR() uses dc_dmub_srv->ctx internally. So if dc_dmub_srv is NULL, the logging itself can dereference a NULL pointer and cause a crash. Fix this by splitting the checks. First check if dc_dmub_srv is NULL and return immediately. Then check dc_dmub_srv->dmub and log the error only when dc_dmub_srv is valid. Fixes the below: ../display/dc/dc_dmub_srv.c:962 dc_dmub_srv_log_diagnostic_data() error: we previously assumed 'dc_dmub_srv' could be null (see line 961) ../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_enable_dpia_trace() error: we previously assumed 'dc_dmub_srv' could be null (see line 1166)

References

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