CVE-2026-43337drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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)
- 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) | from ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before fcc51c81cb472eb460310c477460356dc4845ff7; from ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before 10c13c111d0d7f8e101c742feff264fc98e3f9f7; from ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before 2d4a6f0702c5211e0be8b688c5fc24f082ec74d6; from ca0fb243c3bb53dbbd71d16c76f319bf923ee3d4 before e927b36ae18b66b49219eaa9f46edc7b4fdbb25e; e13689793b9c0e7b5749954e77f5f85e68fe7138; from 6.11.3 before 6.12 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.11.3 before 6.18.22; from 6.19 before 6.19.12; 6.12; 7.0; 7.0; 7.0; 7.0; 7.0; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/fcc51c81cb472eb460310c477460356dc4845ff7
- https://git.kernel.org/stable/c/10c13c111d0d7f8e101c742feff264fc98e3f9f7patch
- https://git.kernel.org/stable/c/2d4a6f0702c5211e0be8b688c5fc24f082ec74d6patch
- https://git.kernel.org/stable/c/e927b36ae18b66b49219eaa9f46edc7b4fdbb25epatch
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.