CVE-2026-89816
In the Linux kernel, the following vulnerability has been resolved: drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used Commit 1c6ceeee6ebb ("drm/atomic: Fix memleak on ERESTARTSYS during non-blocking commits") fixed a very similar issue when the event was allocated by drm_atomic_helper_setup_commit() itself. However, if the event is allocated in prepare_signaling(), it will also be set to NULL in complete_signaling(), which prevents drm_crtc_commit from being put in __drm_atomic_helper_crtc_destroy_state(). Dropping the reference when the event is set to NULL at complete_signaling() fixes the leak. The leak can be reproduced by sending a signal to the thread using DRM_MODE_PAGE_FLIP_EVENT and using a sw_sync fence to cause the atomic ioctl to block at drm_atomic_helper_wait_for_fences(). It happened both with amdgpu and vkms.
Affected versions
Linux kernel versions
4.9.19,
4.10.7,
4.11
and later are affected. Fixed in
5.10.270,
5.15.221,
6.1.188,
6.6.157,
6.12.110,
6.18.51,
7.2.5,
7.3-rc2
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-89816?
CVE-2026-89816 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.9.19 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-89816 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-89816?
Yes. CVE-2026-89816 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 4.9.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-89816 actively exploited?
No. CVE-2026-89816 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.