CVE-2023-0240

Updated: 2023-11-07 20:27:17.908377

Description:

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x 0
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-04-12 08:49:45
CentOS 7 ELS kernel 3.10.0 7.8 HIGH Not Vulnerable 2023-11-02 14:11:47
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Not Vulnerable 2023-04-28 03:35:03
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Not Vulnerable 2023-04-13 11:06:21
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-04-12 08:49:45
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2023-04-12 08:49:45
Ubuntu 16.04 ELS linux 4.4.0 7.8 HIGH Not Vulnerable 2023-02-23 07:39:30
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Not Vulnerable 2023-02-28 13:04:39
Ubuntu 18.04 ELS linux 4.15.0 7.8 HIGH Not Vulnerable 2023-08-28 21:18:32