CVE-2026-53313drm/amd/display: Avoid NULL dereference in dc_dmub_srv error paths
- 5.5MediumCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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)
Timeline
ID reserved
By Linux
- 17 days later
· 17 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < 2afedb8b9262df2a09e62ee7c22530a8c9df5934
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < 1cad9afbb2d559b738b83c498f9c1abdfd327e7f
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < a71fdbd6e8289e2725d33a9873833459f3b1824f
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < 2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22
- affected 2631ac1ac328189031d1aefbbd4929050f72fb23 – < 4ae3e16f4b3bf64140f773629b765d605ee079a9
- affected 5.14
- unaffected < 5.14
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/2afedb8b9262df2a09e62ee7c22530a8c9df5934 (opens in a new tab)
- https://git.kernel.org/stable/c/1cad9afbb2d559b738b83c498f9c1abdfd327e7f (opens in a new tab)
- https://git.kernel.org/stable/c/a71fdbd6e8289e2725d33a9873833459f3b1824f (opens in a new tab)
- https://git.kernel.org/stable/c/2ab18de5ebb11c76bfc8087c5a09fbcccd0dea8a (opens in a new tab)
- https://git.kernel.org/stable/c/b37a978e6d8c33fbfa4abc5dcca4c7cfc6d01f22 (opens in a new tab)
- https://git.kernel.org/stable/c/4ae3e16f4b3bf64140f773629b765d605ee079a9 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-39848 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53313)Record last updated .