CVE-2026-89823

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Source
https://cve.org/CVERecord?id=CVE-2026-89823
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89823.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-89823
Downstream
Published
2026-09-16T10:30:55Z
Modified
2026-09-18T03:48:33Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
drm: fix race between partial drm_dev_register() failure and ioctl
Details

In the Linux kernel, the following vulnerability has been resolved:

drm: fix race between partial drm_dev_register() failure and ioctl

If drm_dev_register() fails after registering a minor (e.g. render minor registered, primary minor fails), userspace could have opened the first minor and entered a drm_dev_enter() critical section. Since the unplugged flag was never set, the ioctl proceeds while the error path tears down device resources.

Fix this by introducing drm_dev_synchronize_unplug(), which sets the unplugged flag and waits for the SRCU barrier, ensuring all in-flight drm_dev_enter() critical sections complete before cleanup proceeds; call it on the error path of drm_dev_register().

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89823.json"
}
References

Affected packages

Git / 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
bee330f3d67273a68dcb99f59480d59553c008b2
Fixed
26d9162213952927cd59c0d94b7e0e992b347bec
Fixed
24d28d15c0f7f7d4a1c229f8730314f0f8758810
Fixed
6729990df9e70623bf53f855b521ae71ca9cb278
Fixed
a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c
Fixed
19dbfe4d586aecfed121cb3fa62281761d9d341f
Fixed
79d09cfe90304ff4f195e47d569800f5e0f8b854
Fixed
2d1215a72159d00001e08dee162e27718934bee9
Fixed
eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89823.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.18.0
Fixed
5.10.270
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.221
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.188
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.157
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.110
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.51
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.2.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89823.json"