CVE-2026-1584

A flaw was found in gnutls. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted ClientHello message with an invalid Pre-Shared Key (PSK) binder value during the TLS handshake. This can lead to a NULL pointer dereference, causing the server to crash and resulting in a remote Denial of Service (DoS) condition.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-26)

CWE

CWE-476

Published

2026-04-09

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• gnu:gnutls
• redhat:hardened_images

References

• https://access.redhat.com/errata/RHSA-2026:7477
• https://access.redhat.com/security/cve/CVE-2026-1584
• https://bugzilla.redhat.com/show_bug.cgi?id=2435258
• https://access.redhat.com/errata/RHSA-2026:7477
• https://access.redhat.com/security/cve/CVE-2026-1584

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