linux: In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking
CVE-2023-21400 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-21400, released July 13, 2023. It is not reported as exploited. Patch Radar priority: Routine.
In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.18.2-1 | DEBIAN-CVE-2023-21400 | Jul 13, 2023 |
| linux · Debian 13.5 (trixie) | 5.18.2-1 | DEBIAN-CVE-2023-21400 | Jul 13, 2023 |
| linux · Debian 14 | 5.18.2-1 | DEBIAN-CVE-2023-21400 | Jul 13, 2023 |
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