Description (CNA)
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().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a93e7b331568227500186a465fee3c2cb5dffd1f before 63eaa7663335d482a8825c231213e312cacea567; affected a93e7b331568227500186a465fee3c2cb5dffd1f before df4faf65194ec6c315a59be4c6749eaeb3009243; affected a93e7b331568227500186a465fee3c2cb5dffd1f before 506b43dde5f9ac0068b1360e6b5dbee07fda59fb; affected a93e7b331568227500186a465fee3c2cb5dffd1f before 15340b00e665af805523b08515294a1aa1778151; affected a93e7b331568227500186a465fee3c2cb5dffd1f before 234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac; affected a93e7b331568227500186a465fee3c2cb5dffd1f before 16695e9059d80ea6661e8399064b0c01f641dd8c; affected a93e7b331568227500186a465fee3c2cb5dffd1f before ec5bd6731183eb6f619140c9bef2ee11ed818c20; affected a93e7b331568227500186a465fee3c2cb5dffd1f before 67b6fc084b034a91c3ec7907a3fed89a2450f30b; affected 085d735c858934e5d5bfaedb1fc98bd9135e6ff1; affected 4.14.100 before 4.15 |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567
- https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243
- https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb
- https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151
- https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac
- https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c
- https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20
- https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b