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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c
https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce
https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3
https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e
https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de
https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1
https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51
https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-16 11:16

Updated : 2026-09-16 11:16

NVD link : CVE-2026-89816

Mitre link : CVE-2026-89816

CVE.ORG link : CVE-2026-89816

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-89816", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "c5517b71101f61a45144e3cf77a19626355272de", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "866a04137dac7e82a3848851061ff7ed15c2847e", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "6a6a7aae4681a20cd32789fea9a487aaafa0e7a3", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "e2f27b5ed9084feb7bae9ef2bc80de37c92280b1", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "ff73f5f43d032c3da3c534c517f661e8dfeb358a", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "66b1b309886337745d395bbc158440ab196305ce", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "e6195b941fdc8d81fc431c9f25539cf6c6234b51", "versionType": "git"}, {"status": "affected", "version": "24835e442f289813aa568d142a755672a740503c", "lessThan": "4d4be202165e832d74849b4a68e289a2a377039c", "versionType": "git"}, {"status": "affected", "version": "c75fe7899538890109aad7bbf92b2f304389e825", "versionType": "git"}, {"status": "affected", "version": "2a3241044b1c4ecc13f73b7158881881fb7534a1", "versionType": "git"}, {"status": "affected", "version": "4.9.19", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.10.7", "lessThan": "4.11", "versionType": "semver"}], "programFiles": ["drivers/gpu/drm/drm_atomic_uapi.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.11"}, {"status": "unaffected", "version": "0", "lessThan": "4.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.110", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.51", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.5", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/drm_atomic_uapi.c"], "defaultStatus": "affected"}]}], "published": "2026-09-16T11:16:46.837", "references": [{"url": "https://git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-16T11:16:46.837", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}