Red Hat: CVE-2023-3776: kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (Multiple Advisories)
Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_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 0323bce598eea038714f941ce2b22541c46d488f.
Solution(s)
- redhat-upgrade-kernel
- redhat-upgrade-kernel-rt
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