{"id":"CVE-2026-89816","title":"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…","summary":"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…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 24835e442f289813aa568d142a755672a740503c < c5517b71101f61a45144e3cf77a19626355272de","Linux >= 24835e442f289813aa568d142a755672a740503c < 866a04137dac7e82a3848851061ff7ed15c2847e","Linux >= 24835e442f289813aa568d142a755672a740503c < 6a6a7aae4681a20cd32789fea9a487aaafa0e7a3","Linux >= 24835e442f289813aa568d142a755672a740503c < e2f27b5ed9084feb7bae9ef2bc80de37c92280b1","Linux >= 24835e442f289813aa568d142a755672a740503c < ff73f5f43d032c3da3c534c517f661e8dfeb358a","Linux >= 24835e442f289813aa568d142a755672a740503c < 66b1b309886337745d395bbc158440ab196305ce","Linux >= 24835e442f289813aa568d142a755672a740503c < e6195b941fdc8d81fc431c9f25539cf6c6234b51","Linux >= 24835e442f289813aa568d142a755672a740503c < 4d4be202165e832d74849b4a68e289a2a377039c","Linux c75fe7899538890109aad7bbf92b2f304389e825","Linux 2a3241044b1c4ecc13f73b7158881881fb7534a1","Linux >= 4.9.19 < 4.10","Linux >= 4.10.7 < 4.11","Linux 4.11"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:46.837","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89816","references":[{"url":"https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89816.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89816"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535320"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89816"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89816"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89816.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-16T10:53:54.004Z","epss":0.0021,"epssPercentile":0.11553,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-911"],"slug":"CVE-2026-89816","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89816.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210025,"id":"CVE-2026-89816","ts":1790235654871,"field":"cvss","old":null,"new":"5.5"},{"seq":210024,"id":"CVE-2026-89816","ts":1790235654871,"field":"severity","old":"none","new":"medium"}]}