CVE-2026-98623drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update
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/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update If list_for_each_entry() exits without hitting a break then "pstate" is not a valid pstate pointer. Introduce a "found" variable instead. The check is reachable from userspace: nvkm_clk_ustate_update() takes the pstate id straight from the 'pstate' debugfs file, so requesting an id that is not in clk->states - or any id at all when the perf tables are broken and the list is empty - makes the pstate->pstate != req test dereference the list head cast to a struct nvkm_pstate, which is an out-of-bounds read. [Francesco: rebased on drm-misc-next, expanded the commit message]
- CVSS
- Not yet scored
- 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
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7c856522069755ab9d163a24ac332cd3cb35fe30 before db5dd9f47b4df1be322f498d846e9a82940a7390; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before 9d550924961f61a491dd95359c63494fa8a23d9f; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before 492e9cfa12f35f7946ea1b78a19f1f9337d62248; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before a867abcfa85ab487066c3d3008a1ba905da04113; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before 5315c7bacfe274ddfe649d9556e9a341ffa812da; 7c856522069755ab9d163a24ac332cd3cb35fe30 builds before 0d096a7f7d79207490858dde731b16da5337e90c; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before 391517da7fd54ae40e4a7fe1cc696217343b0061; from 7c856522069755ab9d163a24ac332cd3cb35fe30 before aff09d9e37e02dc60bde79035ac15b136d602259 | CNA record |
References
- https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390
- https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f
- https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248
- https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113
- https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da
- https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c
- https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061
- https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259
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.