CVE-2025-32988: Gnutls: vulnerability in gnutls othername san export

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-10 · updated 2026-09-01
Weakness: CWE-415

Description

A flaw was found in GnuTLS. A double-free vulnerability exists in GnuTLS due to incorrect ownership handling in the export logic of Subject Alternative Name (SAN) entries containing an otherName. If the type-id OID is invalid or malformed, GnuTLS will call asn1_delete_structure() on an ASN.1 node it does not own, leading to a double-free condition when the parent function or caller later attempts to free the same structure. This vulnerability can be triggered using only public GnuTLS APIs and may result in denial of service or memory corruption, depending on allocator behavior.

Affected products

[UNKNOWN] gnutls: before 3.8.10 — fixed in 3.8.10
Red Hat Enterprise Linux: 6.0, 7.0, 8.0, 9.0, 10.0
Red Hat OpenShift Container Platform 4.18: 4.0

How to fix

Upgrade to a fixed version: [UNKNOWN] gnutls 3.8.10. Check the vendor advisory for mitigations.

References

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