{"id":"CVE-2026-93054","title":"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","summary":"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 f…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 63eaa7663335d482a8825c231213e312cacea567","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < df4faf65194ec6c315a59be4c6749eaeb3009243","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 506b43dde5f9ac0068b1360e6b5dbee07fda59fb","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 15340b00e665af805523b08515294a1aa1778151","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 16695e9059d80ea6661e8399064b0c01f641dd8c","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < ec5bd6731183eb6f619140c9bef2ee11ed818c20","Linux >= a93e7b331568227500186a465fee3c2cb5dffd1f < 67b6fc084b034a91c3ec7907a3fed89a2450f30b","Linux 085d735c858934e5d5bfaedb1fc98bd9135e6ff1","Linux >= 4.14.100 < 4.15","Linux 4.18"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:19.403","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93054","references":[{"url":"https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00145,"epssPercentile":0.04154,"ingestedAt":"2026-09-17T16:21:47.770Z","slug":"CVE-2026-93054","body":"## Overview\n\nIn 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->info 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->info 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->info 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207359,"id":"CVE-2026-93054","ts":1789757341244,"field":"cvss","old":null,"new":"7"},{"seq":207358,"id":"CVE-2026-93054","ts":1789757341244,"field":"severity","old":"none","new":"high"}]}