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CVE-2026-89816— drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已修复： drm: 修复在使用 PAGE_FLIP_EVENT 时，信号中断导致的 drm_crtc_commit 内存泄漏 提交 1c6ceeee6ebb（“drm/atomic: 修复非阻塞提交期间 ERESTARTSYS 导致的内存泄漏”）曾修复过一个非常相似的问题，当时事件（event）是由 本身分配的。 然而，如果事件是在 中分配的，它也会在 中被置为 NULL，这导致在 中未能正确释放 。 通过在 中将事件置为 NULL 时释放其引用（reference），即可修复该泄漏

AI Predicted 5.5 Difficulty: Hard EPSS 0.21% · P10

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 24835e442f289813aa568d142a755672a740503c< c5517b71101f61a45144e3cf77a19626355272de affected
24835e442f289813aa568d142a755672a740503c< 866a04137dac7e82a3848851061ff7ed15c2847e affected
24835e442f289813aa568d142a755672a740503c< 6a6a7aae4681a20cd32789fea9a487aaafa0e7a3 affected
24835e442f289813aa568d142a755672a740503c< e2f27b5ed9084feb7bae9ef2bc80de37c92280b1 affected
24835e442f289813aa568d142a755672a740503c< ff73f5f43d032c3da3c534c517f661e8dfeb358a affected
24835e442f289813aa568d142a755672a740503c< 66b1b309886337745d395bbc158440ab196305ce affected
24835e442f289813aa568d142a755672a740503c< e6195b941fdc8d81fc431c9f25539cf6c6234b51 affected
24835e442f289813aa568d142a755672a740503c< 4d4be202165e832d74849b4a68e289a2a377039c affected
… +14 more rows
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I. Basic Information for CVE-2026-89816

Vulnerability Information
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Vulnerability Title
drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 24835e442f289813aa568d142a755672a740503c ~ c5517b71101f61a45144e3cf77a19626355272de -
Linux Linux 4.11 -

II. Public POCs for CVE-2026-89816

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III. Intelligence Information for CVE-2026-89816

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Other References for CVE-2026-89816 (8)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-89816

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