A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation.
The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered.
We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2023-03-17 16:46 | ALAS2KERNEL-5.10-2023-028 |
Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2023-03-17 16:46 | ALAS2KERNEL-5.15-2023-015 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.4 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
NVD | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |