Linux Kernel up to 6.18.8 drm drm_gem_change_handle_ioctl privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.8. It has been rated as critical. This issue affects the function drm_gem_change_handle_ioctl of the component drm. The manipulation leads to an unknown weakness. This vulnerability is documented as CVE-2026-23149. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.8. It has been rated as critical. This issue affects the function drm_gem_change_handle_ioctl of the component drm. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm: Do not allow userspace to trigger kernel warnings in drm_gem_change_handle_ioctl() Since GEM bo handles are u32 in the uapi and the internal implementation uses idr_alloc() which uses int ranges, passing a new handle larger than INT_MAX trivially triggers a kernel warning: idr_alloc(): ... if (WARN_ON_ONCE(start < 0)) return -EINVAL; ... Fix it by rejecting new handles above INT_MAX and at the same time make the end limit calculation more obvious by moving into int domain.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-23149 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299172 (Linux Distros Unpatched Vulnerability : CVE-2026-23149), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.9 eliminates this vulnerability. Applying the patch ae8831ee0fb2f5f41f39722e7b3749d65bb78d08/12f15d52d38ac53f7c70ea3d4b3d76afed04e064 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (299172). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299172
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23149

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.9
Patch: ae8831ee0fb2f5f41f39722e7b3749d65bb78d08/12f15d52d38ac53f7c70ea3d4b3d76afed04e064

Timelineinfo

01/13/2026 CVE reserved
02/14/2026 +32 days Advisory disclosed
02/14/2026 +0 days VulDB entry created
03/18/2026 +32 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23149 (🔒)
GCVE (CVE): GCVE-0-2026-23149
GCVE (VulDB): GCVE-100-346031

Entryinfo

Created: 02/14/2026 17:57
Updated: 03/18/2026 02:16
Changes: 02/14/2026 17:57 (58), 02/16/2026 23:13 (2), 02/19/2026 10:55 (1), 03/18/2026 02:16 (10)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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