CVE-2026-33845: GNU Gnutls

Critical severity, CVSS 9.1. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• GNU Gnutls: affected versions not specified
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Openshift Container Platform: version 4.0 only

Published 2026-04-30. Last modified 2026-10-08.