What’s Vulnerable › Vulnerabilities

CVE-2021-41581

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-24 · updated 2026-06-17
• Weakness: CWE-125

Description

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.

Affected products

• OpenBSD Libressl: through 3.4.0

References

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

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