CVE-2024-50030: drm/xe/ct: prevent UAF in send_recv()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-21 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/ct: prevent UAF in send_recv() Ensure we serialize with completion side to prevent UAF with fence going out of scope on the stack, since we have no clue if it will fire after the timeout before we can erase from the xa. Also we have some dependent loads and stores for which we need the correct ordering, and we lack the needed barriers. Fix this by grabbing the ct->lock after the wait, which is also held by the completion side. v2 (Badal): - Also print done after acquiring the lock and seeing timeout. (cherry picked from commit 52789ce35c55ccd30c4b67b9cc5b2af55e0122ea)

Affected products

Linux kernel: from 6.8 before 6.11.4; 6.12-rc1, 6.12-rc2 — fixed in 6.11.4

How to fix

Upgrade to a fixed version: Linux kernel 6.11.4. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-50030 or the next vulnerability affects your stack