UBUNTU-CVE-2025-21849
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)
02 / AFFECTED SOFTWARE
Affected packages
29 explicit affected versions
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14 explicit affected versions
11 explicit affected versions
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3 explicit affected versions
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43 explicit affected versions
11 explicit affected versions
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12 explicit affected versions
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6 explicit affected versions
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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)
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/e49477f7f78598295551d486ecc7f020d796432e
- https://git.kernel.org/stable/c/2bf1f4c129db7a10920655b000f0292f1ee509c2
- https://git.kernel.org/stable/c/47ae46ac5407646420e06b78e0dad331e56a4bb4
- https://git.kernel.org/stable/c/e49477f7f78598295551d486ecc7f020d796432e
- https://ubuntu.com/security/CVE-2025-21849
- https://ubuntu.com/security/notices/USN-7521-1
- https://ubuntu.com/security/notices/USN-7521-2
- https://ubuntu.com/security/notices/USN-7521-3
- https://www.cve.org/CVERecord?id=CVE-2025-21849