Double-free in GnuTLS SAN otherName export logic
CVE-2025-32988 is a double-free vulnerability in GnuTLS caused by incorrect ownership handling during export of Subject Alternative Name (SAN) entries that contain an otherName value. When processing an otherName whose type-id OID is invalid or malformed, GnuTLS may invoke asn1_delete_structure() on an ASN.1 node that it does not own. The same structure may later be freed again by the parent function or caller, resulting in a double-free condition. The issue is reachable through public GnuTLS APIs and affects the SAN export logic for malformed otherName content.
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