RHSA-2026:43575 — Security Advisory

Red Hat Security Advisory: gnutls security update

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Severity

Moderate

Red Hat Product Security

RHEL 7

Products

Official CSAF product identity

Published · July 22, 2026

Updated · November 4, 2026

Topic

An update for gnutls is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: Policy bypass due to case-sensitive nameConstraints comparison (CVE-2026-3833)
gnutls: gnutls: Security bypass due to incorrect name constraint handling (CVE-2026-42011)
gnutls: gnutls: Certificate validation bypass due to improper handling of URI and SRV SANs (CVE-2026-42012)
gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name (CVE-2026-42013)
gnutls: Fix use-after-free in gnutls_pkcs11_token_set_pin (CVE-2026-42014)
gnutls: gnutls: Memory corruption due to off-by-one error in PKCS#12 bag handling (CVE-2026-42015)

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.