CVE-2025-6395

Publication date 10 July 2025

Last updated 12 September 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

A NULL pointer dereference flaw was found in the GnuTLS software in _gnutls_figure_common_ciphersuite().

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnutls28	25.10 questing	Fixed 3.8.9-3ubuntu1
	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	Not affected
	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	Upstream: 2313561

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