CVE-2021-31829

Description

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZI7OBCJQDNWMKLBP6MZ5NV4EUTDAMX6Q/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4X2G5YAPYJGI3PFEZZNOTRYI33GOCCZ/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VWCZ6LJLENL2C3URW5ICARTACXPFCFN2/

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067f

http://www.openwall.com/lists/oss-security/2021/05/04/4

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3