CVE-2026-98623
Vulnérabilité non évaluée dans Linux (Linux)
Description
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]
Gravité et risque d'exploitation
CVE-2026-98623 obtient un score CVSS de 0.0/10, soit une gravité non évaluée.
Que faire ?
- Vérifiez si Linux (versions <=6.1.*, <=6.12.*, <3.13, 6.18.55, 0, <9d550924961f61a491dd95359c63494fa8a23d9f, <a867abcfa85ab487066c3d3008a1ba905da04113, 6.12.112, 5.10.271, 6.6.158, <=5.10.*, <=6.6.*, 6.1.189, <0d096a7f7d79207490858dde731b16da5337e90c, <492e9cfa12f35f7946ea1b78a19f1f9337d62248, <5315c7bacfe274ddfe649d9556e9a341ffa812da, <=6.18.*, 3.13, 5.15.222, <391517da7fd54ae40e4a7fe1cc696217343b0061, <=7.2.*, 7.2.9, <=*, <aff09d9e37e02dc60bde79035ac15b136d602259, <=5.15.*, 7c856522069755ab9d163a24ac332cd3cb35fe30, <db5dd9f47b4df1be322f498d846e9a82940a7390, 7.3) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- 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