CVE-2026-53313drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths
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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)
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 2631ac1ac328189031d1aefbbd4929050f72fb23 builds before 1cad9afbb2d559b738b83c498f9c1abdfd327e7f; from 2631ac1ac328189031d1aefbbd4929050f72fb23 before a71fdbd6e8289e2725d33a9873833459f3b1824f; 2631ac1ac328189031d1aefbbd4929050f72fb23 builds before 2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a; from 2631ac1ac328189031d1aefbbd4929050f72fb23 before b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22; 2631ac1ac328189031d1aefbbd4929050f72fb23 builds before 4ae3e16f4b3bf64140f773629b765d605ee079a9 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.14 before 7.0.10 | NVD |
References
- https://git.kernel.org/stable/c/1cad9afbb2d559b738b83c498f9c1abdfd327e7f
- https://git.kernel.org/stable/c/a71fdbd6e8289e2725d33a9873833459f3b1824f
- https://git.kernel.org/stable/c/2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a
- https://git.kernel.org/stable/c/b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22patch
- https://git.kernel.org/stable/c/4ae3e16f4b3bf64140f773629b765d605ee079a9patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.