CVE-2023-21400: Debian Linux

Medium severity, CVSS 6.7. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Google Android: affected versions not specified

Published 2023-07-13. Last modified 2026-06-17.