PT-2026-47001 · Julia · Gnutls Jll

Published 2026-05-26 · Updated 2026-05-26

OSV

CVSS v3.1

7.5

High

Base vector

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

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls deinit function is called after detecting a handshake failure.

Fix

Related Identifiers

JLSEC-2026-519

Affected Products

Gnutls Jll

References · 10

• https://osv.dev/vulnerability/JLSEC-2026-519 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3 · Vendor Advisory
• https://security.netapp.com/advisory/ntap-20200911-0006 · Note
• https://security.gentoo.org/glsa/202009-01 · Note
• https://usn.ubuntu.com/4491-1 · Note
• https://gitlab.com/gnutls/gnutls/-/issues/1071 · Note
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html · Note
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html · Note
• https://gnutls.org/security-new.html#GNUTLS-SA-2020-09-04 · Note