PT-2026-31811 · Tls 1.3 · Tls 1.3

Seunghyun Yoon + 1 · Published 2026-04-09 · Updated 2026-04-10 · CVE-2026-5264

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions DTLS 1.3 (affected versions not specified)

Description A heap buffer overflow exists in the processing of DTLS 1.3 ACK messages. A remote attacker can potentially trigger this overflow by sending a crafted DTLS 1.3 ACK message.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-5264

Affected Products

Tls 1.3

References · 9

• https://github.com/wolfssl/wolfssl/pull/10076 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5264 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-5264 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5264 · Security Note
• https://ubuntu.com/security/CVE-2026-5264 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5264 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5264 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2042410732281577689 · Twitter Post
• https://twitter.com/CVEnew/status/2042364283065925780 · Twitter Post