drm/nouveau: RCU-free the scheduler-containing nouveau_sched
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: RCU-free the scheduler-containing nouveau_sched struct nouveau_sched embeds a struct drm_gpu_scheduler (base). nouveau_sched_destroy() calls nouveau_sched_fini() (which does drm_sched_fini(&sched->base)) and then frees the object with plain kfree(sched). drm_sched_fence_get_timeline_name() returns fence->sched->name, and the scheduler fence keeps a .release callback so it is not ops-detached on signalling. A finished fence exported to userspace via drm_syncobj / sync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(), and a later get_timeline_name() -- reachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free read). Per the dma-fence lifetime contract the exporter must keep the data backing a signalled fence alive for an RCU grace period. Free the scheduler-containing object with kfree_rcu() instead of kfree().
CVE-2026-98512
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-2026-98512
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": "5f03a507b29e44a848f315c7240c19894dd8be4f",
"lessThan": "40edf5eefc3fd94592a91d6eb074d4fc6f606c75",
"versionType": "git"
},
{
"status": "affected",
"version": "5f03a507b29e44a848f315c7240c19894dd8be4f",
"lessThan": "35151e9a8274174ccbb92e3b3ba7dc7a008dcada",
"versionType": "git"
},
{
"status": "affected",
"version": "5f03a507b29e44a848f315c7240c19894dd8be4f",
"lessThan": "cd6e11b6ebe04a0a1f1435df561acada9eadc563",
"versionType": "git"
},
{
"status": "affected",
"version": "5f03a507b29e44a848f315c7240c19894dd8be4f",
"lessThan": "f7eae6d8d768fabd6b59779ca7da79e02c74e113",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nouveau_sched.c",
"drivers/gpu/drm/nouveau/nouveau_sched.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"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/nouveau_sched.c",
"drivers/gpu/drm/nouveau/nouveau_sched.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98512
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55608 · Revision 1
- Added to Heist Feed
- Publisher date