CVE-2025-21849

Summary

In the Linux kernel, the following vulnerability has been resolved:

drm/i915/gt: Use spin_lock_irqsave() in interruptible context

spin_lock/unlock() functions used in interrupt contexts could result in a deadlock, as seen in GitLab issue #13399, which occurs when interrupt comes in while holding a lock.

Try to remedy the problem by saving irq state before spin lock acquisition.

v2: add irqs' state save/restore calls to all locks/unlocks in signal_irq_work() execution (Maciej)

v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead of other lock/unlock calls and add Fixes and Cc tags (Tvrtko); change title and commit message

(cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2f2cc53b5fe7022f3ae602eb24573d52f8740959 < 2bf1f4c129db7a10920655b000f0292f1ee509c2affected
LinuxLinux2f2cc53b5fe7022f3ae602eb24573d52f8740959 < 47ae46ac5407646420e06b78e0dad331e56a4bb4affected
LinuxLinux2f2cc53b5fe7022f3ae602eb24573d52f8740959 < e49477f7f78598295551d486ecc7f020d796432eaffected
LinuxLinux6.9affected
LinuxLinux0 < 6.9unaffected
LinuxLinux6.12.17 <= 6.12.*unaffected
LinuxLinux6.13.5 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References