RHSA-2026:34372: Important: gnutls security update

Published Jul 1, 2026
·
Updated

Important: gnutls security update

Other sources

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS.Security Fix(es): gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment (CVE-2026-33845) gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846) gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

— Red Hat

Affected Software

19 affected componentsFixes available
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)
redhat/gnutls<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-dane<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-dane<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-debuginfo<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-debuginfo<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-devel<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-devel<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-utils<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-utils<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-dane<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-debuginfo<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-devel<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1
redhat/gnutls-utils<3.3.29-9.el7_9.1
3.3.29-9.el7_9.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/gnutls to a version that resolves this vulnerability.

    Fixed in 3.3.29-9.el7_9.1
  2. Upgrade

    Upgrade redhat/gnutls-dane to a version that resolves this vulnerability.

    Fixed in 3.3.29-9.el7_9.1
  3. Upgrade

    Upgrade redhat/gnutls-debuginfo to a version that resolves this vulnerability.

    Fixed in 3.3.29-9.el7_9.1
  4. Upgrade

    Upgrade redhat/gnutls-devel to a version that resolves this vulnerability.

    Fixed in 3.3.29-9.el7_9.1
  5. Upgrade

    Upgrade redhat/gnutls-utils to a version that resolves this vulnerability.

    Fixed in 3.3.29-9.el7_9.1

Event History

Jul 1, 2026
Advisory Published
via Red Hat·04:30 PM
Data Sourced
via Red Hat·04:30 PM
DescriptionSeverityAffected Software
Jul 26, 2026
Advisory Published
via Red Hat·06:38 PM
Data Sourced
via Red Hat·06:38 PM
Remedy
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Frequently Asked Questions

1

What is the severity of RHSA-2026:34372?

The severity of RHSA-2026:34372 is high with a score of 7.

2

What security issues does RHSA-2026:34372 address?

RHSA-2026:34372 addresses a denial of service vulnerability via DTLS zero-length fragment, identified as CVE-2026-33845.

3

How do I fix RHSA-2026:34372?

To fix RHSA-2026:34372, update the gnutls packages to the latest version provided by Red Hat.

4

Which software packages are affected by RHSA-2026:34372?

The affected software packages include redhat/gnutls, redhat/gnutls-dane, redhat/gnutls-debuginfo, redhat/gnutls-devel, and redhat/gnutls-utils.

5

What platforms are impacted by RHSA-2026:34372?

RHSA-2026:34372 impacts Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, both big and little endian.

Company

Resources

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