Red Hat: CVE-2023-3609: cls_u32 component reference counter leak if tcf_change_indev() fails (Multiple Advisories)
Description
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.
Solution(s)
- redhat-upgrade-kernel
- redhat-upgrade-kernel-rt
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