CVE-2026-23149
MEDIUMCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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3Description
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.
Analysis
A local attacker with unprivileged access can trigger kernel warnings in the Linux kernel's DRM subsystem by passing oversized handle values to drm_gem_change_handle_ioctl(), exploiting improper input validation between userspace u32 and kernel int types. This vulnerability affects the Linux kernel and allows denial of service through repeated warning generation, though no patch is currently available.
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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