CVE-2026-5260 HIGH

CVE-2026-5260: Gnutls: gnutls: information disclosure via heap overread in rsa key exchange

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-126
Published May 26, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

Key dates

02Disclosure timeline

May 26, 2026 CVE published
June 30, 2026 Record updated