Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately.
We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 5.18 (including) | 5.19.11 (excluding) |
| Linux_kernel | Linux | 6.0-rc1 (including) | 6.0-rc1 (including) |
| Linux_kernel | Linux | 6.0-rc2 (including) | 6.0-rc2 (including) |
| Linux_kernel | Linux | 6.0-rc3 (including) | 6.0-rc3 (including) |
| Linux_kernel | Linux | 6.0-rc4 (including) | 6.0-rc4 (including) |
| Linux_kernel | Linux | 6.0-rc5 (including) | 6.0-rc5 (including) |