Double Free in GNU Gnutls
CVE-2025-32988
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.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.001
Affected products
- GNU Gnutls
- Red Hat Ceph Storage 7 — versions sha256:4d2f9dc5b2b33ee1c77bbfabcbbb9f4d94d343b04c4de2e4f8b3b81a1f0fd2fe, 7
- Red Hat Discovery 2 — versions sha256:435ba9959b793d46a63a74c343bb8c3ff68350496afec12cc5e894dfc40b7648, 2.3.0-1760554384
- Red Hat Enterprise Linux 10 — versions 0:3.8.9-9.el10_0.14
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:3.6.16-8.el8_10.4
- Red Hat Enterprise Linux 9 — versions 0:3.8.3-6.el9_6.2
- Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions — versions 0:3.7.6-21.el9_2.4
- Red Hat Enterprise Linux 9.4 Extended Update Support — versions 0:3.8.3-4.el9_4.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2025:16115 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:16116 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:17181 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:17348 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:17361 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:17415 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:19088 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:22529 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:7477 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2025-32988 (vdb-entry, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-32988?
- CVE-2025-32988 is a medium-severity vulnerability in GNU Gnutls, classified under Double Free. CVSS score: 6.5/10. Published 2025-07-10.
- How severe is CVE-2025-32988?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-32988 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.