CVE-2025-4575

/// Technical description

Issue summary: Use of -addreject option with the openssl x509 application adds

a trusted use instead of a rejected use for a certificate.

Impact summary: If a user intends to make a trusted certificate rejected for

a particular use it will be instead marked as trusted for that use.

A copy & paste error during minor refactoring of the code introduced this

issue in the OpenSSL 3.5 version. If, for example, a trusted CA certificate

should be trusted only for the purpose of authenticating TLS servers but not

for CMS signature verification and the CMS signature verification is intended

to be marked as rejected with the -addreject option, the resulting CA

certificate will be trusted for CMS signature verification purpose instead.

Only users which use the trusted certificate format who use the openssl x509

command line application to add rejected uses are affected by this issue.

The issues affecting only the command line application are considered to

be Low severity.

The FIPS modules in 3

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References