{"id":"CVE-2026-89823","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89823","summary":"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…","details":"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().","published":"2026-09-16T10:30:55.534Z","modified":"2026-09-16T10:30:55.534Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T10:30:55.534Z"}}