# CVE-2026-23149: linux: In the Linux kernel, the following vulnerability has been resolved:  drm: Do not allow userspace to trigger kernel wa...

CVE-2026-23149 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23149 (version 6.18.9-1), released February 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23149
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 14, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.18.9-1 | [DEBIAN-CVE-2026-23149](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23149.md) | Feb 14, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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