{"id":"CVE-2026-89823","published":"2026-09-16T11:16:48.850","lastModified":"2026-09-16T15:18:11.300","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: fix race between partial drm_dev_register() failure and ioctl\n\nIf drm_dev_register() fails after registering a minor (e.g. render minor\nregistered, primary minor fails), userspace could have opened the first\nminor and entered a drm_dev_enter() critical section. Since the\nunplugged flag was never set, the ioctl proceeds while the error path\ntears down device resources.\n\nFix this by introducing drm_dev_synchronize_unplug(), which sets the\nunplugged flag and waits for the SRCU barrier, ensuring all in-flight\ndrm_dev_enter() critical sections complete before cleanup proceeds; call\nit on the error path of drm_dev_register().","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f","tags":[]},{"url":"https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810","tags":[]},{"url":"https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec","tags":[]},{"url":"https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9","tags":[]},{"url":"https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278","tags":[]},{"url":"https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854","tags":[]},{"url":"https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c","tags":[]},{"url":"https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This vulnerability allows a race condition where userspace could open a minor device before the device is fully registered, leading to potential resource cleanup issues.","exploitability":"Exploitation requires userspace to interact with the DRM device before the registration failure is handled, making it moderately difficult.","blast_radius":"If exploited, it could lead to resource leaks or corruption, impacting system stability and performance.","remediation":"Upgrade to the fixed version 5.19.0-rc1 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["race-condition","device-registration","kernel"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-08T08:43:23.275Z"}}