Linux kernel bpf verifier vulnerability

Summary

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

Timeline

1. Apr 2, 2020, 6:00 PM UTCCVE published
2. Sep 17, 2024, 2:15 AM UTCRecord last updated

Affected versions

• Linux kernel Linux kernel

  From 5.6-stable · fixed in 5.6.1; From 5.5-stable · fixed in 5.5.14; From 5.4.7 · fixed in 5.4.29

References 19