CVE-2025-32988

Publication date 10 July 2025

Last updated 15 September 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
gnutls28 25.04 plucky
Fixed 3.8.9-2ubuntu3.1
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 3.8.3-1.1ubuntu3.4
22.04 LTS jammy
Fixed 3.7.3-4ubuntu1.7
20.04 LTS focal
Fixed 3.6.13-2ubuntu1.12+esm1
18.04 LTS bionic
Fixed 3.5.18-1ubuntu1.6+esm2
16.04 LTS xenial
Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
gnutls28

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

References

Related Ubuntu Security Notices (USN)

Other references