A use-after-free vulnerability in the Linux kernel's net...
High severity
Unreviewed
Published
Jul 21, 2023
to the GitHub Advisory Database
•
Updated Jan 11, 2024
Description
Published by the National Vulnerability Database
Jul 21, 2023
Published to the GitHub Advisory Database
Jul 21, 2023
Last updated
Jan 11, 2024
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
References