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Vulnerability DatabaseCVE-2022-49970
CVE-2022-49970:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability (CVE-2022-49970) was identified in the Linux kernel's BPF and cgroup subsystems, specifically related to a kernel BUG in the purgeeffectiveprogs function. The issue was discovered through Syzkaller testing and affects the stability of Linux kernel systems (NVD).
Technical details
The vulnerability manifests as a kernel BUG at kernel/bpf/cgroup.c:925 when specific conditions are met in the cgroup BPF functionality. The issue occurs during the detachment of BPF programs from cgroups, specifically in the _cgroupbpf_detach function. The bug is triggered when dealing with multiple BPF programs attached to different cgroup layers with certain attachment types (NVD).
Impact
When triggered, this vulnerability causes a kernel BUG, which results in a system crash. This affects the stability and availability of the system running the vulnerable Linux kernel version (NVD).
Mitigation and workarounds
The vulnerability has been fixed in the Linux kernel through patches that modify the behavior of the purgeeffectiveprogs function to properly handle cases where no matching programs are found (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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