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().
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= bee330f3d67273a68dcb99f59480d59553c008b2, < 26d9162213952927cd59c0d94b7e0e992b347bec; >= bee330f3d67273a68dcb99f59480d59553c008b2, < 24d28d15c0f7f7d4a1c229f8730314f0f8758810; >= bee330f3d67273a68dcb99f59480d59553c008b2, < 6729990df9e70623bf53f855b521ae71ca9cb278; >= bee330f3d67273a68dcb99f59480d59553c008b2, < a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c; >= bee330f3d67273a68dcb99f59480d59553c008b2, < 19dbfe4d586aecfed121cb3fa62281761d9d341f; >= bee330f3d67273a68dcb99f59480d59553c008b2, < 79d09cfe90304ff4f195e47d569800f5e0f8b854; >= bee330f3d67273a68dcb99f59480d59553c008b2, < 2d1215a72159d00001e08dee162e27718934bee9; >= bee330f3d67273a68dcb99f59480d59553c008b2, < eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e |
| Linux | Linux | 4.18 |
References
- https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f
- https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810
- https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec
- https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9
- https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278
- https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854
- https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c
- https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received