CVE-2026-89823drm: fix race between partial drm_dev_register() failure and ioctl
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from bee330f3d67273a68dcb99f59480d59553c008b2 before 26d9162213952927cd59c0d94b7e0e992b347bec; from bee330f3d67273a68dcb99f59480d59553c008b2 before 24d28d15c0f7f7d4a1c229f8730314f0f8758810; from bee330f3d67273a68dcb99f59480d59553c008b2 before 6729990df9e70623bf53f855b521ae71ca9cb278; from bee330f3d67273a68dcb99f59480d59553c008b2 before a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c; from bee330f3d67273a68dcb99f59480d59553c008b2 before 19dbfe4d586aecfed121cb3fa62281761d9d341f; from bee330f3d67273a68dcb99f59480d59553c008b2 before 79d09cfe90304ff4f195e47d569800f5e0f8b854; from bee330f3d67273a68dcb99f59480d59553c008b2 before 2d1215a72159d00001e08dee162e27718934bee9; from bee330f3d67273a68dcb99f59480d59553c008b2 before eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e | CNA record |
References
- https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec
- https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810
- https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278
- https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c
- https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f
- https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854
- https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9
- https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.