{"id":"CVE-2026-93054","summary":"uio: Fix stale info pointer in failed registration path","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix stale info pointer in failed registration path\n\nAfter device_add(), the UIO device is visible to userspace and /dev/uioX\ncan be opened. If a later setup step fails, __uio_register_device()\nunwinds the device but leaves idev-\u003einfo pointing at the caller-owned\nstruct uio_info.\n\nThat is unsafe when an opener races with the failed registration path.\nThe open file keeps a reference to the uio_device, while the caller sees\nregistration failure and may free its struct uio_info. Later file\noperations can then follow idev-\u003einfo and dereference freed memory.\n\nHandle post-device_add() failures like unregister: remove UIO attributes\nwhile the info pointer is still valid, then clear idev-\u003einfo under\ninfo_lock and wake existing waiters/async users before removing the\ndevice and minor. This makes already-open file descriptors observe the\nsame \"device gone\" state as normal uio_unregister_device().","modified":"2026-09-19T03:47:31.068788258Z","published":"2026-09-17T16:10:43.104Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93054.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151"},{"type":"WEB","url":"https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93054.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93054"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a93e7b331568227500186a465fee3c2cb5dffd1f"},{"fixed":"63eaa7663335d482a8825c231213e312cacea567"},{"fixed":"df4faf65194ec6c315a59be4c6749eaeb3009243"},{"fixed":"506b43dde5f9ac0068b1360e6b5dbee07fda59fb"},{"fixed":"15340b00e665af805523b08515294a1aa1778151"},{"fixed":"234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac"},{"fixed":"16695e9059d80ea6661e8399064b0c01f641dd8c"},{"fixed":"ec5bd6731183eb6f619140c9bef2ee11ed818c20"},{"fixed":"67b6fc084b034a91c3ec7907a3fed89a2450f30b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"085d735c858934e5d5bfaedb1fc98bd9135e6ff1"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.100"},{"fixed":"4.15"}]}],"versions":["v4.14.99","v4.14.98","v4.14.97","v4.14.96","v4.14.95","v4.14.94","v4.14.93","v4.14.92","v4.14.91","v4.14.90","v4.14.89","v4.14.88","v4.14.87","v4.14.86","v4.14.85","v4.14.84","v4.14.83","v4.14.82","v4.14.81","v4.14.80","v4.14.79","v4.14.78","v4.14.77","v4.14.76","v4.14.75","v4.14.74","v4.14.73","v4.14.72","v4.14.71","v4.14.70","v4.14.69","v4.14.68","v4.14.67","v4.14.66","v4.14.65","v4.14.64","v4.14.63","v4.14.62","v4.14.61","v4.14.60","v4.14.59","v4.14.58","v4.14.57","v4.14.56","v4.14.55","v4.14.54","v4.14.53","v4.14.52","v4.14.51","v4.14.50","v4.14.49","v4.14.48","v4.14.47","v4.14.46","v4.14.45","v4.14.44","v4.14.43","v4.14.42","v4.14.41","v4.14.40","v4.14.39","v4.14.38","v4.14.37","v4.14.36","v4.14.35","v4.14.34","v4.14.33","v4.14.32","v4.14.31","v4.14.30","v4.14.29","v4.14.28","v4.14.27","v4.14.26","v4.14.25","v4.14.24","v4.14","v4.14.23","v4.14.22","v4.14.21","v4.14.20","v4.14.19","v4.14.18","v4.14.17","v4.14.16","v4.14.15","v4.14.14","v4.14.13","v4.14.12","v4.14.11","v4.14.10","v4.14.9","v4.14.8","v4.14.7","v4.14.6","v4.14.5","v4.14.4","v4.14.3","v4.14.2","v4.14-rc1","v4.14.1","v4.14-rc7","v4.14-rc3","v4.13","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v4.13-rc2","v4.13-rc1","v4.13-rc3","v4.13-rc7","v4.13-rc4","v4.13-rc5","v4.13-rc6","v4.12-rc1","v4.12","v4.12-rc5","v4.12-rc7","v4.12-rc6","v4.12-rc4","v4.12-rc2","v4.12-rc3","v4.11","v4.11-rc1","v4.11-rc6","v4.11-rc8","v4.11-rc7","v4.11-rc3","v4.11-rc5","v4.11-rc2","v4.11-rc4","v4.10","v4.9","v4.10-rc8","v4.10-rc3","v4.10-rc1","v4.10-rc7","v4.10-rc6","v4.10-rc2","v4.10-rc5","v4.10-rc4","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.9-rc1","v4.9-rc5","v4.9-rc3","v4.9-rc4","v4.9-rc2","v4.8","v4.8-rc8","v4.8-rc2","v4.8-rc1","v4.8-rc7","v4.8-rc6","v4.8-rc5","v4.8-rc4","v4.8-rc3","v4.7","v4.7-rc4","v4.7-rc2","v4.7-rc1","v4.7-rc7","v4.7-rc6","v4.7-rc3","v4.7-rc5","v4.6","v4.6-rc1","v4.6-rc6","v4.6-rc4","v4.6-rc7","v4.6-rc5","v4.5-rc4","v4.6-rc2","v4.6-rc3","v4.5","v4.4","v4.5-rc1","v4.5-rc6","v4.5-rc2","v4.5-rc7","v4.5-rc5","v4.5-rc3","v4.4-rc1","v4.4-rc2","v4.4-rc8","v4.4-rc3","v4.4-rc7","v4.4-rc5","v4.4-rc6","v4.4-rc4","v4.3","v4.3-rc1","v4.3-rc6","v4.3-rc4","v4.3-rc2","v4.3-rc7","v4.3-rc5","v4.3-rc3","v4.2","v4.2-rc2","v4.2-rc1","v4.2-rc8","v4.2-rc4","v4.2-rc6","v4.2-rc7","v4.0-rc5","v4.2-rc5","v4.2-rc3","v4.1-rc2","v4.1","v4.1-rc1","v4.1-rc8","v4.1-rc7","v4.1-rc6","v4.1-rc3","v4.1-rc4","v4.0","v4.1-rc5","v4.0-rc1","v4.0-rc2","v4.0-rc7","v4.0-rc3","v4.0-rc6","v4.0-rc4","v3.19","v3.19-rc7","v3.19-rc5","v3.19-rc1","v3.19-rc6","v3.19-rc4","v3.18-rc1","v3.19-rc3","v3.19-rc2","v3.18","v3.18-rc7","v3.18-rc6","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.17","v3.17-rc1","v3.17-rc7","v3.17-rc2","v3.17-rc4","v3.16","v3.17-rc5",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