CVE-2026-33845

7.5 HIGH

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow ...

Published: 2026-04-30 · Last updated: 2026-06-02

Severity and scoring

CVSS: 7.5 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: CWE-191

Affected products

Vendor	Product
gnu	enterprise_linux, gnutls, openshift_container_platform
redhat	enterprise_linux, gnutls, openshift_container_platform

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-33845
[Vendor advisory]https://access.redhat.com/errata/RHSA-2026:13274
[Other]https://access.redhat.com/errata/RHSA-2026:20611
[Other]https://access.redhat.com/errata/RHSA-2026:20612
[Other]https://access.redhat.com/errata/RHSA-2026:20613
[Vendor advisory]https://access.redhat.com/security/cve/CVE-2026-33845
[Vendor advisory]https://bugzilla.redhat.com/show_bug.cgi?id=2450624

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