CVE-2026-89816drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used
Updated under an hour ago ()
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 24835e442f289813aa568d142a755672a740503c before c5517b71101f61a45144e3cf77a19626355272de; 24835e442f289813aa568d142a755672a740503c builds before 866a04137dac7e82a3848851061ff7ed15c2847e; 24835e442f289813aa568d142a755672a740503c builds before 6a6a7aae4681a20cd32789fea9a487aaafa0e7a3; from 24835e442f289813aa568d142a755672a740503c before e2f27b5ed9084feb7bae9ef2bc80de37c92280b1; from 24835e442f289813aa568d142a755672a740503c before ff73f5f43d032c3da3c534c517f661e8dfeb358a; 24835e442f289813aa568d142a755672a740503c builds before 66b1b309886337745d395bbc158440ab196305ce; from 24835e442f289813aa568d142a755672a740503c before e6195b941fdc8d81fc431c9f25539cf6c6234b51; 24835e442f289813aa568d142a755672a740503c builds before 4d4be202165e832d74849b4a68e289a2a377039c; and 4 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de
- https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e
- https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3
- https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1
- https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a
- https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce
- https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51
- https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.