CVE-2023-0240
Use after free in io_uring in the Linux Kernel
Summary
Use after free in io_uring in the Linux Kernel
Original description
The description as published by the source.
There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.
In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-0240 linux Fixed in: 5.10.162-1
References
- advisory github.com
- advisory nvd.nist.gov
- advisory security.netapp.com
- patch github.com
- web git.kernel.org
- web git.kernel.org
- web kernel.dance