SB2026061159 - SUSE update for gnutls

Description

This security bulletin contains information about 3 vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2026-33845)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service or execute arbitrary code.

The vulnerability exists due to a heap-based buffer overflow in the DTLS reassembly code when processing crafted DTLS fragments. A remote attacker can send specially crafted DTLS traffic to cause a denial of service or execute arbitrary code.

2) Heap-based buffer overflow (CVE-ID: CVE-2026-33846)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a heap overwrite.

The vulnerability exists due to a heap-based buffer overflow in DTLS fragment handling when processing inconsistent DTLS fragments. A remote attacker can send specially crafted DTLS fragments to cause a heap overwrite.

3) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-42009)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper implementation of a qsort comparator contract in the DTLS packet sequence number comparator when ordering DTLS packets by sequence numbers. A remote attacker can send DTLS packets with duplicate sequence numbers to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2026/suse-su-20262366-1/