CVE-2024-49943: drm/xe/guc_submit: add missing locking in wedged_fini

First published: Mon Oct 21 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc_submit: add missing locking in wedged_fini Any non-wedged queue can have a zero refcount here and can be running concurrently with an async queue destroy, therefore dereferencing the queue ptr to check wedge status after the lookup can trigger UAF if queue is not wedged. Fix this by keeping the submission_state lock held around the check to postpone the free and make the check safe, before dropping again around the put() to avoid the deadlock. (cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/title
• agent/type
• agent/first-publish-date
• agent/author
• agent/severity
• agent/weakness
• agent/remedy
• collector/mitre-cve
• source/MITRE
• agent/last-modified-date
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/software-canonical-lookup-request
• collector/usn-cve
• source/Ubuntu
• collector/launchpad-cve
• source/Launchpad
• collector/security-tracker-debian
• source/Debian
• agent/source
• agent/references
• agent/softwarecombine
• agent/tags
• agent/description
• agent/event
• vendor/linux
• canonical/linux kernel
• version/linux kernel/6.11
• version/linux kernel/6.12-rc1
• package-manager/debian