CVE-2025-38703
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-38703
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38703.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-38703
- Downstream
- Related
- Published
- 2025-09-04T15:32:54Z
- Modified
- 2025-10-22T15:36:09.779891Z
- Summary
- drm/xe: Make dma-fences compliant with the safe access rules
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Make dma-fences compliant with the safe access rules
Xe can free some of the data pointed to by the dma-fences it exports. Most notably the timeline name can get freed if userspace closes the associated submit queue. At the same time the fence could have been exported to a third party (for example a sync_fence fd) which will then cause an use- after-free on subsequent access.
To make this safe we need to make the driver compliant with the newly documented dma-fence rules. Driver has to ensure a RCU grace period between signalling a fence and freeing any data pointed to by said fence.
For the timeline name we simply make the queue be freed via kfree_rcu and for the shared lock associated with multiple queues we add a RCU grace period before freeing the per GT structure holding the lock.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/683b0e397dad9f26a42dcacf6f7f545a77ce6c06
- https://git.kernel.org/stable/c/6bd90e700b4285e6a7541e00f969cab0d696adde
- https://git.kernel.org/stable/c/b17fcce70733c211cb5dabf54f4f9491920b1d92
- https://git.kernel.org/stable/c/ba37807d08bae67de6139346a85650cab5f6145a
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixedb17fcce70733c211cb5dabf54f4f9491920b1d92
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixedba37807d08bae67de6139346a85650cab5f6145a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixed683b0e397dad9f26a42dcacf6f7f545a77ce6c06
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixed6bd90e700b4285e6a7541e00f969cab0d696adde