A flaw was found in the Linux kernel's BPF subsystem in sanitize_ptr_alu in kernel/bpf/verifier.c, where protection against speculative execution attacks (Spectre mitigation) can be bypassed. The highest threat from this vulnerability is to confidentiality. References: https://www.openwall.com/lists/oss-security/2021/06/21/1
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1974457]