CVE-2026-98180Linux Kernel Vulnerability
drm/msm: RCU-free the scheduler-containing ring and VM objects
Published Oct 6, 2026 · Updated Oct 19, 2026 · Also known as EUVD-2026-93108, GHSA-h748-767h-vm7p
Key Facts
Patch in the next maintenance window- CVE-2026-98180 is a high-severity vulnerability (CVSS 7.1 v3.1) affecting Azl3 Kernel 6.6.157.1-1 (Microsoft), Linux Kernel, Linux (debian) and 5 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 0.1% probability of exploitation in the next 30 days.
- Fixed versions are available, including Kernel 6.18.54, Kernel 7.2.8, kernel-devel 7.2.10-1.1.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Scores
CVSS v3.1
7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS (30-day exploit likelihood)
0.1%
Exploit maturity
Proof of concept
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
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/
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Azl3 Kernel 6.6.157.1-1Microsoft | See advisory | n/a |
| Linux KernelLinux | See advisory | 6.18.54 |
| Linuxdebian | >= 1d8a5ca436ee4a28eec14cb813f790f7cdeeee19 | 7.2.8-1 |
| kernel-develsuse | See advisory | 7.2.10-1.1 |
| kernel-macrossuse | See advisory | 7.2.10-1.1 |
Patched Releases
Kernel
6.18.54, 7.2.8
kernel-devel
7.2.10-1.1
kernel-macros
7.2.10-1.1
kernel-source
7.2.10-1.1
kernel-source-vanilla
7.2.10-1.1
Linux
1, 7.2.8-1, 01c8d1f385f788f1bbbbb7687c4386d614281218, 6.18.54, 7.2.8, 713abac5c04ccbae67f9ac68c3921845535388e7, d81bf4581903b0cba0698cd4d1c07fc6be21754a
Linux Kernel
6.18.54, 7.2.8, 7.3-rc4
Timeline
Publicly disclosed
Oct 6, 2026
Last updated
Oct 19, 2026
Weakness Type
- CWE-825 Expired Pointer Dereference
References
- advisorycve.org · CVERecord
- advisorynvd.nist.gov · CVE-2026-98180
- advisoryRelease Notes
- othergit.kernel.org · linux.git
- othergit.kernel.org · 01c8d1f
FAQ
Common Questions.
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.
Affected: Azl3 Kernel 6.6.157.1-1 (Microsoft); Linux Kernel; Linux (debian) versions >= 1d8a5ca436ee4a28eec14cb813f790f7cdeeee19, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Kernel 6.18.54, Kernel 7.2.8, kernel-devel 7.2.10-1.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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