Unknown

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

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.

Published Sep 16, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 11% of scored CVEs · Oct 22, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 24835e442f289813aa568d142a755672a740503c and < c5517b71101f61a45144e3cf77a19626355272de≥ 24835e442f289813aa568d142a755672a740503c and < 866a04137dac7e82a3848851061ff7ed15c2847e≥ 24835e442f289813aa568d142a755672a740503c and < 6a6a7aae4681a20cd32789fea9a487aaafa0e7a3≥ 24835e442f289813aa568d142a755672a740503c and < e2f27b5ed9084feb7bae9ef2bc80de37c92280b1≥ 24835e442f289813aa568d142a755672a740503c and < ff73f5f43d032c3da3c534c517f661e8dfeb358a≥ 24835e442f289813aa568d142a755672a740503c and < 66b1b309886337745d395bbc158440ab196305ce≥ 24835e442f289813aa568d142a755672a740503c and < e6195b941fdc8d81fc431c9f25539cf6c6234b51≥ 24835e442f289813aa568d142a755672a740503c and < 4d4be202165e832d74849b4a68e289a2a377039c and 5 more version c75fe7899538890109aad7bbf92b2f304389e825version 2a3241044b1c4ecc13f73b7158881881fb7534a1≥ 4.9.19 and < 4.10≥ 4.10.7 and < 4.11version 4.11	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 22, 2026 · 7 reading(s) · max 0.21%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 16, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 19, 2026 – Oct 19, 2026
1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

10 on the record

git.kernel.org/stable/c/66b1b309886337745d395bbc158440ab196305ce
NIST National Vulnerability Database
git.kernel.org/stable/c/e2f27b5ed9084feb7bae9ef2bc80de37c92280b1
NIST National Vulnerability Database
git.kernel.org/stable/c/4d4be202165e832d74849b4a68e289a2a377039c
NIST National Vulnerability Database
github.com/advisories/GHSA-6f96-mhg4-cfw6
GitHub Security Advisories
git.kernel.org/stable/c/866a04137dac7e82a3848851061ff7ed15c2847e
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-89816
GitHub Security Advisories
git.kernel.org/stable/c/6a6a7aae4681a20cd32789fea9a487aaafa0e7a3
NIST National Vulnerability Database
git.kernel.org/stable/c/ff73f5f43d032c3da3c534c517f661e8dfeb358a
NIST National Vulnerability Database
git.kernel.org/stable/c/e6195b941fdc8d81fc431c9f25539cf6c6234b51
NIST National Vulnerability Database
git.kernel.org/stable/c/c5517b71101f61a45144e3cf77a19626355272de
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-98869 bpf: Infer zext_dst based on static register liveness analysis 1d
Unknown CVE-2023-7356 Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SERVICE_UUID 1d
Unknown CVE-2026-98866 sched/cache: Introduce task_struct->sched_cache_grp to fix UAF 4d
Unknown CVE-2026-98867 dm-pcache: bound the logical key offset from persistent memory 4d
Unknown CVE-2026-98868 dm-pcache: reject a kset that overruns its segment 4d
Unknown CVE-2026-98856 kprobes: Skip disarmed probes when checking optkprobe overlap 4d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-89816 is "drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.