Description (CNA)
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]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before db5dd9f47b4df1be322f498d846e9a82940a7390; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before 9d550924961f61a491dd95359c63494fa8a23d9f; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before 492e9cfa12f35f7946ea1b78a19f1f9337d62248; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before a867abcfa85ab487066c3d3008a1ba905da04113; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before 5315c7bacfe274ddfe649d9556e9a341ffa812da; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before 0d096a7f7d79207490858dde731b16da5337e90c; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before 391517da7fd54ae40e4a7fe1cc696217343b0061; affected 7c856522069755ab9d163a24ac332cd3cb35fe30 before aff09d9e37e02dc60bde79035ac15b136d602259 |
| Linux / Linux | affected 3.13; unaffected 0 before 3.13; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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