CVE-2026-53313 (GCVE-0-2026-53313)

Vulnerability from cvelistv5 – Published: 2026-06-26 19:41 – Updated: 2026-09-07 15:44
VLAI
Title
drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths
Summary
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)
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2631ac1ac328189031d1aefbbd4929050f72fb23 , < a71fdbd6e8289e2725d33a9873833459f3b1824f (git)
Affected: 2631ac1ac328189031d1aefbbd4929050f72fb23 , < 2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a (git)
Affected: 2631ac1ac328189031d1aefbbd4929050f72fb23 , < b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22 (git)
Affected: 2631ac1ac328189031d1aefbbd4929050f72fb23 , < 4ae3e16f4b3bf64140f773629b765d605ee079a9 (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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