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.
History

Thu, 08 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 11 Nov 2025 15:30:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2021-06-23T15:37:09.000Z

Updated: 2026-10-08T21:03:25.368Z

Reserved: 2021-05-28T00:00:00.000Z

Link: CVE-2021-33624

cve-icon Vulnrichment

Updated: 2024-08-03T23:58:21.425Z

cve-icon NVD

Status : Modified

Published: 2021-06-23T16:15:07.957

Modified: 2026-10-08T21:17:35.550

Link: CVE-2021-33624

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-06-21T00:00:00Z

Links: CVE-2021-33624 - Bugzilla