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VULNERABILITIES

CVE-2026-42009 Details

Description

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:13274 redhat-SADPThird Party Advisory
https://access.redhat.com/errata/RHSA-2026:20611 redhat-SADPThird Party Advisory
https://access.redhat.com/errata/RHSA-2026:20612 redhat-SADPThird Party Advisory
https://access.redhat.com/errata/RHSA-2026:20613 redhat-SADPThird Party Advisory
https://access.redhat.com/errata/RHSA-2026:26319 redhat-SADP

see all 64 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-475Undefined Behavior for Input to APIredhat-SADP
CWE-475Undefined Behavior for Input to API[email protected]

Affected Products

ProductVersions

Change History

55 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-42009
NVD Published Date:
May 18, 2026
NVD Last Modified:
Sep 18, 2026
Source:
[email protected]
CVE-2026-42009 Details - Not Deferred