drm/msm: RCU-free the scheduler-containing ring and VM objects
In the Linux kernel, the following vulnerability has been resolved: drm/msm: RCU-free the scheduler-containing ring and VM objects Both struct msm_ringbuffer and struct msm_gem_vm embed a struct drm_gpu_scheduler. msm_ringbuffer_destroy() and the VM free callback msm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then free the containing object with plain kfree(). 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 (the submit out-fence, or a VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded scheduler after the ring/VM is freed, so a later get_timeline_name() -- reachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab 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 objects with kfree_rcu() instead of kfree(). Patchwork: https://patchwork.freedesktop.org/patch/750234/
CVE-2026-98180
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-2026-98180
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": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
"lessThan": "d81bf4581903b0cba0698cd4d1c07fc6be21754a",
"versionType": "git"
},
{
"status": "affected",
"version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
"lessThan": "713abac5c04ccbae67f9ac68c3921845535388e7",
"versionType": "git"
},
{
"status": "affected",
"version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
"lessThan": "01c8d1f385f788f1bbbbb7687c4386d614281218",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/msm/msm_gem.h",
"drivers/gpu/drm/msm/msm_gem_vma.c",
"drivers/gpu/drm/msm/msm_ringbuffer.c",
"drivers/gpu/drm/msm/msm_ringbuffer.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/msm/msm_gem.h",
"drivers/gpu/drm/msm/msm_gem_vma.c",
"drivers/gpu/drm/msm/msm_ringbuffer.c",
"drivers/gpu/drm/msm/msm_ringbuffer.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98180
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #38263 · Revision 1
- Added to Heist Feed
- Publisher date