Veille CVE
CVE-2026-93054
7.0 ÉlevéeDescription
In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.0 Élevée | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Références
- https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151
- https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c
- https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac
- https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb
- https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567
- https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b
- https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243
- https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20