What is CVE-2021-33938?

CVE-2021-33938 is a high-severity vulnerability in openSUSE Libsolv, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-09-02.

How severe is CVE-2021-33938?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in openSUSE Libsolv

CVE-2021-33938

Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Vulnerability class: Buffer Overflow

Published 2021-09-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

openSUSE Libsolv

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/openSUSE/libsolv/issues/420 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-33938?: CVE-2021-33938 is a high-severity vulnerability in openSUSE Libsolv, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-09-02.
How severe is CVE-2021-33938?: High severity. CVSS v3 base score is 7.5 out of 10.