What’s Vulnerable › Vulnerabilities

CVE-2022-48437

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-12 · updated 2026-06-17
• Weakness: CWE-295

Description

An issue was discovered in x509/x509_verify.c in LibreSSL before 3.6.1, and in OpenBSD before 7.2 errata 001. x509_verify_ctx_add_chain does not store errors that occur during leaf certificate verification, and therefore an incorrect error is returned. This behavior occurs when there is an installed verification callback that instructs the verifier to continue upon detecting an invalid certificate.

Affected products

• OpenBSD Libressl: before 3.6.1 — fixed in 3.6.1
• OpenBSD: before 7.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: OpenBSD Libressl 3.6.1; OpenBSD 7.2. Check the vendor advisory for mitigations.

References

• https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.1-relnotes.txt
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/001_x509.patch.sig
• https://github.com/openbsd/src/commit/4f94258c65a918ee3d8670e93916d15bf879e6ec
• https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.1-relnotes.txt
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/001_x509.patch.sig
• https://github.com/openbsd/src/commit/4f94258c65a918ee3d8670e93916d15bf879e6ec

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