cve/2021/CVE-2021-29154.md

CVE-2021-29154

Description

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.

POC

Reference

• http://packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076-1.html
• https://news.ycombinator.com/item?id=26757760
• https://www.oracle.com/security-alerts/cpujul2022.html

Github

• https://github.com/ARPSyndicate/cvemon