What is CVE-2021-45941?

CVE-2021-45941 is a medium-severity vulnerability in Libbpf Project, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-01-01.

How severe is CVE-2021-45941?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Libbpf Project

CVE-2021-45941

libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (8 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c).

Vulnerability class: Buffer Overflow

Published 2022-01-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: -0.000

Affected products

Libbpf Project — versions 0.6.0, 0.6.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1576.yaml (Exploit, Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-45941?: CVE-2021-45941 is a medium-severity vulnerability in Libbpf Project, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2022-01-01.
How severe is CVE-2021-45941?: Medium severity. CVSS v3 base score is 6.5 out of 10.