Is CVE-2026-1584 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-1584 being exploited in the wild.

How severe is CVE-2026-1584?

High severity, with a CVSS score of 7.5, published 9 April 2026.

Which products and versions are affected?

GnuTLS GnuTLS 3.8.12-1.1.hum1 and earlier; Red Hat Red Hat Hardened Images gnutls-3.8.12-1.1.hum1.

Is there a fix for CVE-2026-1584?

A patch was published on 2026-04-10: Red Hat released security advisory RHSA-2026:7477 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-1584 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-1584?

Check whether you run Gnutls or Redhat Hardened Images. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-1584: GnuTLS NULL pointer dereference in PSK binder verification

CVE-2026-1584 · Severity: high · CVSS 7.5 · Published 2026-04-09

GnuTLS is a widely used security library that enables secure communications over the internet. A flaw in how it handles specific connection requests allows a remote, unauthenticated attacker to crash servers using this library. This results in a denial-of-service (DoS) condition, potentially disrupting business operations and service availability.

Technologies: Gnutls, Redhat Hardened Images. Vendors: Gnu, Redhat.

Quick answers

Is CVE-2026-1584 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-1584 being exploited in the wild.
How severe is CVE-2026-1584?: High severity, with a CVSS score of 7.5, published 9 April 2026.
Which products and versions are affected?: GnuTLS GnuTLS 3.8.12-1.1.hum1 and earlier; Red Hat Red Hat Hardened Images gnutls-3.8.12-1.1.hum1.
Is there a fix for CVE-2026-1584?: A patch was published on 2026-04-10: Red Hat released security advisory RHSA-2026:7477 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-1584 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-1584?: Check whether you run Gnutls or Redhat Hardened Images. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A NULL pointer dereference exists in GnuTLS within the PSK (Pre-Shared Key) binder verification logic. When a server receives a ClientHello message referencing a previously issued session ticket, the '_gnutls_get_cred' function may return a NULL pointer for PSK credentials. If the attacker provides an invalid PSK binder value, the server attempts to dereference this NULL pointer in 'server_recv_params' while attempting to access 'pskcred->binder_algo'. This vulnerability can be exploited by a remote, unauthenticated attacker to crash the server process. Red Hat has released patches for affected Hardened Images (RHSA-2026:7477).

Affected products

GnuTLS GnuTLS 3.8.12-1.1.hum1 and earlier
Red Hat Red Hat Hardened Images gnutls-3.8.12-1.1.hum1

Timeline

2026-01-29: disclosed: Reported via Red Hat Bugzilla
2026-04-09: advisory: NVD publication date
2026-04-10: patched: Red Hat released security advisory RHSA-2026:7477

References

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