Heap-based buffer overflow in GnuTLS - CVE-2026-33845
Published: April 30, 2026
Vulnerability identifier: #VU128570
CSH Severity: Medium
CVSSv4.0: 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
CVE-ID: CVE-2026-33845
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
GnuTLS
GnuTLS
Software vendor:
GnuTLS
GnuTLS
Description
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.
Remediation
Install security update from vendor's website.