drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update
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]
CVE-2026-98623
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98623
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "db5dd9f47b4df1be322f498d846e9a82940a7390",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "9d550924961f61a491dd95359c63494fa8a23d9f",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "492e9cfa12f35f7946ea1b78a19f1f9337d62248",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "a867abcfa85ab487066c3d3008a1ba905da04113",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "5315c7bacfe274ddfe649d9556e9a341ffa812da",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "0d096a7f7d79207490858dde731b16da5337e90c",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "391517da7fd54ae40e4a7fe1cc696217343b0061",
"versionType": "git"
},
{
"status": "affected",
"version": "7c856522069755ab9d163a24ac332cd3cb35fe30",
"lessThan": "aff09d9e37e02dc60bde79035ac15b136d602259",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98623
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38643 · Revision 1
- Added to Heist Feed
- Publisher date