{"id":"CVE-2026-89816","published":"2026-09-16T11:16:46.837","lastModified":"2026-09-16T11:16:46.837","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used\n\nCommit 1c6ceeee6ebb (\"drm/atomic: Fix memleak on ERESTARTSYS during\nnon-blocking commits\") fixed a very similar issue when the event was\nallocated by drm_atomic_helper_setup_commit() itself.\n\nHowever, if the event is allocated in prepare_signaling(), it will also be\nset to NULL in complete_signaling(), which prevents drm_crtc_commit from\nbeing put in __drm_atomic_helper_crtc_destroy_state().\n\nDropping the reference when the event is set to NULL at\ncomplete_signaling() fixes the leak.\n\nThe leak can be reproduced by sending a signal to the thread using\nDRM_MODE_PAGE_FLIP_EVENT and using a sw_sync fence to cause the atomic\nioctl to block at drm_atomic_helper_wait_for_fences(). It happened both\nwith amdgpu and vkms.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c","tags":[]},{"url":"https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce","tags":[]},{"url":"https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3","tags":[]},{"url":"https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e","tags":[]},{"url":"https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de","tags":[]},{"url":"https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1","tags":[]},{"url":"https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51","tags":[]},{"url":"https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}