CVE-2026-33845

HIGH

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

Title source: cna

Description

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.

References (2)

[Vdb Entry, X_Refsource_Redhat] https://access.redhat.com/security/cve/CVE-2026-33845

[Issue Tracking, X_Refsource_Redhat] https://bugzilla.redhat.com/show_bug.cgi?id=2450624

Scores

CVSS v3 7.5

EPSS 0.0004

EPSS Percentile 11.1%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-191

Status published

Products (7)

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 6

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat Hardened Images

Red Hat/Red Hat OpenShift Container Platform 4

Published Apr 30, 2026

Tracked Since Apr 30, 2026