PT-2026-37377 · Gnutls+2 · Gnutls+2

Joshua Rogers · Published 2026-04-29 · Updated 2026-05-27 · CVE-2026-42010

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions gnutls versions prior to 3.8.13-1.1

Description Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) incorrectly match usernames containing a NUL character with truncated usernames. A remote attacker can exploit this by sending a specially crafted username to bypass the authentication process and gain unauthorized access.

Recommendations Update to version 3.8.13-1.1.

Fix

Weakness Enumeration

CWE-626

Related Identifiers

ALSA-2026:20611

CVE-2026-42010

ECHO-8172-5400-EF47

OESA-2026-2333

OESA-2026-2334

OESA-2026-2335

OESA-2026-2403

OESA-2026-2404

OPENSUSE-SU-2026:10691-1

RHSA-2026:13274

USN-8284-1

Affected Products

Linuxmint

Ubuntu

Gnutls

References · 86

• https://ubuntu.com/security/notices/USN-8284-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:20611 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:20611 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-42010 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42014 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-42013 · Security Note
• https://access.redhat.com/errata/RHSA-2026:13274 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42011 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42012 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-42013 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2404 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-42010 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42009 · Security Note
• https://ubuntu.com/security/CVE-2026-42015 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-3832 · Vendor Advisory