PoC Index

CVE-2021-33624

MEDIUM 4.7EPSS 0.9%

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.

CVSS v3.1
4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0
4.7 MEDIUMAV:L/AC:M/Au:N/C:C/I:N/A:N
EPSS
0.92% chance of exploitation in the next 30 days, 58th percentile
Published
2021-06-23
Updated
2025-11-11

Proof-of-concept exploits (2)

References

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