CVE-2026-33845 HIGH

CVE-2026-33845: Gnutls: gnutls: denial of service via dtls zero-length fragment

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-191
Published April 30, 2026
Last update July 1, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.

Key dates

02Disclosure timeline

April 30, 2026 CVE published
July 1, 2026 Record updated