drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op Each bind_job_op is zeroed by kzalloc_obj() in bind_job_op_from_uop(), and the OP_MAP_SPARSE case in nouveau_uvmm_bind_job_submit() only creates a region, so op->ops stays NULL for a successfully processed sparse map. If a later op in the same job fails, the reverse unwind loop revisits that op and calls drm_gpuva_ops_free(&uvmm->base, op->ops) unconditionally. drm_gpuva_ops_free() dereferences its argument right away (list_for_each_entry_safe on &ops->list), so a NULL op->ops oopses. The path is reachable by any render-node fd holder, since NOUVEAU_VM_BIND is DRM_RENDER_ALLOW. Guard the free with IS_ERR_OR_NULL(), as nouveau_uvmm_bind_job_cleanup() already does for the identical free.
CVE-2026-89802
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-2026-89802
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": "b88baab828713ce0b49b185444b2ee83bed373a8",
"lessThan": "d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3",
"versionType": "git"
},
{
"status": "affected",
"version": "b88baab828713ce0b49b185444b2ee83bed373a8",
"lessThan": "3bf493cf7ed0c2b3df728977a257e0d99b4db1c6",
"versionType": "git"
},
{
"status": "affected",
"version": "b88baab828713ce0b49b185444b2ee83bed373a8",
"lessThan": "b7dc03e09313d22a6d230b759de3b05d504c008f",
"versionType": "git"
},
{
"status": "affected",
"version": "b88baab828713ce0b49b185444b2ee83bed373a8",
"lessThan": "3857238de6bce6c1573e8cb86c37b067e5208f05",
"versionType": "git"
},
{
"status": "affected",
"version": "b88baab828713ce0b49b185444b2ee83bed373a8",
"lessThan": "412a6ceb56d501ef2f8202e26ab4b5d4dfbca566",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nouveau_uvmm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nouveau_uvmm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89802
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48544 · Revision 1
- Added to Heist Feed
- Publisher date