CVE-2021-41581

5.5 mediumEPSS 0.6%

Medium (5.5) in openbsd libressl. EPSS 0.6% chance of exploitation in the next 30 days.

x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read. When the input exceeds DOMAIN_PART_MAX_LEN, the buffer lacks '\0' termination.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2021-09-24
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

openbsd:libressl

References

https://github.com/libressl-portable/openbsd/issues/126
https://github.com/libressl-portable/openbsd/issues/126

Check your stack JSON