Description
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().
References8
- git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f
- git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810
- git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec
- git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9
- git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278
- git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854
- git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c
- git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 8 November 2026
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