drm/nouveau: fix double-free in nvif_vmm_dtor
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix double-free in nvif_vmm_dtor On failure, nouveau_cli_init() calls nouveau_cli_fini() to tear the client down. Then, nouveau_drm_open() also enters into its cleanup path and calls nouveau_cli_fini() AGAIN. nouveau_cli_fini() calls nouveau_vmm_fini(): void nouveau_vmm_fini(struct nouveau_vmm *vmm) { nouveau_svmm_fini(&vmm->svmm); nvif_vmm_dtor(&vmm->vmm); vmm->cli = NULL; } Inside nvif_vmm_dtor(), vmm->page is freed unconditionally: void nvif_vmm_dtor(struct nvif_vmm *vmm) { kfree(vmm->page); nvif_object_dtor(&vmm->object); } vmm->page is never cleared after being freed, so the second call of nvif_vmm_dtor() will cause a double-free. Found by fuzzing the nouveau driver with a modified Syzkaller: BUG: KASAN: double-free in nvif_vmm_dtor+0x31/0x50 drivers/gpu/drm/nouveau/nvif/vmm.c:194 Free of addr ffff888010fcdc30 by task syz.0.173/2567 CPU: 1 UID: 0 PID: 2567 Comm: syz.0.173 Not tainted 7.2.0 #24 PREEMPT(lazy) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x95/0xe0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcb/0x5a0 mm/kasan/report.c:482 kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:557 check_slab_allocation+0xe4/0x110 mm/kasan/common.c:235 kasan_slab_pre_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:2622 [
CVE-2026-98515
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-2026-98515
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": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "023e7a01f8fb27799f0987b5bcda325d73a2904c",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "375901ac0f286e81be00a4126e57d488cb401884",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "bf542ecd4f60d4689818d194e7ca74772fe0f8b5",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "f09f4a536935b15539f2de9fe775a2641202be90",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "279e5ac137370e274a09dd552547ae6bddd0d4d5",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "109a8d2d5b7d2719ebe09df3f9241023900b3846",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "872a5473c02a26c955be44d52b7ab2f8ea70a2cf",
"versionType": "git"
},
{
"status": "affected",
"version": "20d8a88e557aae5264e793f4626c45cd644c7144",
"lessThan": "97077ac87afe9e91ec074ef0be64454e7ccbf344",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/nouveau/nouveau_drm.c",
"drivers/gpu/drm/nouveau/nvif/vmm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.11",
"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/nouveau_drm.c",
"drivers/gpu/drm/nouveau/nvif/vmm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98515
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55609 · Revision 1
- Added to Heist Feed
- Publisher date