Speculative Store Bypass Side-Channel Attack in Linux Kernel

CVE-2021-35477 · MEDIUM Severity

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occur before a store operation that has an attacker-controlled value.

Learn more about our Cis Benchmark Audit For Distribution Independent Linux.