CVE-2026-43337drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()
- 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: Fix NULL pointer dereference in dcn401_init_hw() dcn401_init_hw() assumes that update_bw_bounding_box() is valid when entering the update path. However, the existing condition: ((!fams2_enable && update_bw_bounding_box) || freq_changed) does not guarantee this, as the freq_changed branch can evaluate to true independently of the callback pointer. This can result in calling update_bw_bounding_box() when it is NULL. Fix this by separating the update condition from the pointer checks and ensuring the callback, dc->clk_mgr, and bw_params are validated before use. Fixes the below: ../dc/hwss/dcn401/dcn401_hwseq.c:367 dcn401_init_hw() error: we previously assumed 'dc->res_pool->funcs->update_bw_bounding_box' could be null (see line 362) (cherry picked from commit 86117c5ab42f21562fedb0a64bffea3ee5fcd477)
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 6 months later
· 6 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)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 – < fcc51c81cb472eb460310c477460356dc4845ff7
- affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 – < 10c13c111d0d7f8e101c742feff264fc98e3f9f7
- affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 – < 2d4a6f0702c5211e0be8b688c5fc24f082ec74d6
- affected ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 – < e927b36ae18b66b49219eaa9f46edc7b4fdbb25e
- affected e13689793b9c0e7b5749954e77f5f85e68fe7138
- affected 6.11.3 – < 6.12
- affected 6.12
- unaffected < 6.12
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.22 – ≤ 6.18.*
- unaffected 6.19.12 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References4
- https://git.kernel.org/stable/c/fcc51c81cb472eb460310c477460356dc4845ff7 (opens in a new tab)
- https://git.kernel.org/stable/c/10c13c111d0d7f8e101c742feff264fc98e3f9f7 (opens in a new tab)
- https://git.kernel.org/stable/c/2d4a6f0702c5211e0be8b688c5fc24f082ec74d6 (opens in a new tab)
- https://git.kernel.org/stable/c/e927b36ae18b66b49219eaa9f46edc7b4fdbb25e (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-2026-28621 (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-2026-43337)Record last updated .