CVE-2025-38703

HIGH EPSS 4.9%
Published Sep 4, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Sep 4, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.8  –  <6.12.43
linuxlinux_kernel*≥6.13  –  <6.15.11
linuxlinux_kernel*≥6.16  –  <6.16.2

References 4

  • git.kernel.org https://git.kernel.org/stable/c/683b0e397dad9f26a42dcacf6f7f545a77ce6c06
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bd90e700b4285e6a7541e00f969cab0d696adde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b17fcce70733c211cb5dabf54f4f9491920b1d92
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba37807d08bae67de6139346a85650cab5f6145a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/683b0e397dad9f26a42dcacf6f7f545a77ce6c06
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6bd90e700b4285e6a7541e00f969cab0d696adde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b17fcce70733c211cb5dabf54f4f9491920b1d92
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba37807d08bae67de6139346a85650cab5f6145a
    Patch