{"id":"CVE-2026-89816","summary":"drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used","details":"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.","modified":"2026-10-28T02:30:40.641657150Z","published":"2026-09-16T10:30:49.052Z","related":["openSUSE-SU-2026:11880-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89816.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89816.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89816"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"24835e442f289813aa568d142a755672a740503c"},{"fixed":"c5517b71101f61a45144e3cf77a19626355272de"},{"fixed":"866a04137dac7e82a3848851061ff7ed15c2847e"},{"fixed":"6a6a7aae4681a20cd32789fea9a487aaafa0e7a3"},{"fixed":"e2f27b5ed9084feb7bae9ef2bc80de37c92280b1"},{"fixed":"ff73f5f43d032c3da3c534c517f661e8dfeb358a"},{"fixed":"66b1b309886337745d395bbc158440ab196305ce"},{"fixed":"e6195b941fdc8d81fc431c9f25539cf6c6234b51"},{"fixed":"4d4be202165e832d74849b4a68e289a2a377039c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.9.19"},{"fixed":"4.10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.10.7"},{"fixed":"4.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c75fe7899538890109aad7bbf92b2f304389e825"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2a3241044b1c4ecc13f73b7158881881fb7534a1"}]}],"versions":["v4.9.337","v4.9.336","v4.9.335","v4.9.334","v4.9.333","v4.9.332","v4.9.331","v4.9.330","v4.9.329","v4.9.328","v4.9.327","v4.9.326","v4.9.325","v4.9.324","v4.9.323","v4.9.322","v4.9.321","v4.9.320","v4.9.319","v4.9.318","v4.9.317","v4.9.316","v4.9.315","v4.9.314","v4.9.313","v4.9.312","v4.9.311","v4.9.310","v4.9.309","v4.9.308","v4.9.307","v4.9.306","v4.9.305","v4.9.304","v4.9.303","v4.9.302","v4.9.301","v4.9.300","v4.9.299","v4.9.298","v4.9.297","v4.9.296","v4.9.295","v4.9.294","v4.9.293","v4.9.292","v4.9.291","v4.9.290","v4.9.289","v4.9.288","v4.9.287","v4.9.286","v4.9.285","v4.9.284","v4.9.283","v4.9.282","v4.9.281","v4.9.280","v4.9.279","v4.9.278","v4.9.277","v4.9.276","v4.9.275","v4.9.274","v4.9.273","v4.9.272","v4.9.271","v4.9.270","v4.9.269","v4.9.268","v4.9.267","v4.9.266","v4.9.265","v4.9.264","v4.9.263","v4.9.262","v4.9.261","v4.9.260","v4.9.259","v4.9.258","v4.9.257","v4.9.256","v4.9.255","v4.9.254","v4.9.253","v4.9.252","v4.9.251","v4.9.250","v4.9.249","v4.9.248","v4.9.247","v4.9.246","v4.9.245","v4.9.244","v4.9.243","v4.9.242","v4.9.241","v4.9.240","v4.9.239","v4.9.238","v4.9.237","v4.9.236","v4.9.235","v4.9.234","v4.9.233","v4.9.232","v4.9.231","v4.9.230","v4.9.229","v4.9.228","v4.9.227","v4.9.226","v4.9.225","v4.9.224","v4.9.223","v4.9.222","v4.9.221","v4.9.220","v4.9.219","v4.9.218","v4.9.217","v4.9.216","v4.9.215","v4.9.214","v4.9.213","v4.9.212","v4.9.211","v4.9.210","v4.9.209","v4.9.208","v4.9.207","v4.9.206","v4.9.205","v4.9.204","v4.9.203","v4.9.202","v4.9.201","v4.9.200","v4.9.199","v4.9.198","v4.9.197","v4.9.196","v4.9.195","v4.9.194","v4.9.193","v4.9.192","v4.9.191","v4.9.190","v4.9.189","v4.9.188","v4.9.187","v4.9.186","v4.9.185","v4.9.184","v4.9.183","v4.9.182","v4.9.181","v4.9.180","v4.9.179","v4.9.178","v4.9.177","v4.9.176","v4.9.175","v4.9.174","v4.9.173","v4.9.172","v4.9.171","v4.9.170","v4.9.169","v4.9.168","v4.9.167","v4.9.166","v4.9.165","v4.9.164","v4.9.163","v4.9.162","v4.9.161","v4.9.160","v4.9.159","v4.9.158","v4.9.157","v4.9.156","v4.9.155","v4.9.154","v4.9.153","v4.9.152","v4.9.151","v4.9.150","v4.9.149","v4.9.148","v4.9.147","v4.9.146","v4.9.145","v4.9.144","v4.9.143","v4.9.142","v4.9.141","v4.9.140","v4.9.139","v4.9.138","v4.9.137","v4.9.136","v4.9.135","v4.9.134","v4.9.133","v4.9.132","v4.9.131","v4.9.130","v4.9.129","v4.9.128","v4.9.127","v4.9.126","v4.9.125","v4.9.124","v4.9.123","v4.9.122","v4.9.121","v4.9.120","v4.9.119","v4.9.118","v4.9.117","v4.9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