CVE-2026-98623drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% 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/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]
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 1 day later
· 1 day 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < db5dd9f47b4df1be322f498d846e9a82940a7390
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < 9d550924961f61a491dd95359c63494fa8a23d9f
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < 492e9cfa12f35f7946ea1b78a19f1f9337d62248
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < a867abcfa85ab487066c3d3008a1ba905da04113
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < 5315c7bacfe274ddfe649d9556e9a341ffa812da
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < 0d096a7f7d79207490858dde731b16da5337e90c
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < 391517da7fd54ae40e4a7fe1cc696217343b0061
- affected 7c856522069755ab9d163a24ac332cd3cb35fe30 – < aff09d9e37e02dc60bde79035ac15b136d602259
- affected 3.13
- unaffected < 3.13
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390 (opens in a new tab)
- https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f (opens in a new tab)
- https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248 (opens in a new tab)
- https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113 (opens in a new tab)
- https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da (opens in a new tab)
- https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c (opens in a new tab)
- https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061 (opens in a new tab)
- https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259 (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-2026-103668 (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-2026-98623)Record last updated .