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CVE-2021-33624

Published: Jun 23, 2021

Modified: Nov 11, 2025

PUBLISHED

Description

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner

http://www.openwall.com/lists/oss-security/2021/06/21/1

https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db

[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update

mailing-list

https://github.com/benschlueter/CVE-2021-33624

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