- Issued:
- 2026-05-26
- Updated:
- 2026-05-26
RHSA-2026:20612 - Important: gnutls security update
Synopsis
Important: gnutls security update
Type/Severity
Security Advisory Important
Topic
An update for gnutls is now available for Red Hat Enterprise Linux 9.
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: Fix qsort comparator in DTLS reassembly (CVE-2026-42009)
- gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845)
- gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010)
- gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833)
- gnutls: Fix intersecting empty name constraints (CVE-2026-42011)
- gnutls: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846)
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.
Solution
Before applying this update, make sure all previously released errata relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
Affected Products
| Product | Version | Arch |
|---|---|---|
| Red Hat Enterprise Linux for x86_64 | 9 | x86_64 |
| Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions | 9.8 | x86_64 |
| Red Hat Enterprise Linux for x86_64 - Extended Update Support | 9.8 | x86_64 |
| Red Hat Enterprise Linux for x86_64 - Extended Life Cycle | 9.8 | x86_64 |
| Red Hat Enterprise Linux for Power, little endian | 9 | ppc64le |
| Red Hat Enterprise Linux for Power, little endian - Extended Update Support | 9.8 | ppc64le |
| Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle | 9.8 | ppc64le |
| Red Hat Enterprise Linux for IBM z Systems | 9 | s390x |
| Red Hat Enterprise Linux for IBM z Systems - Extended Update Support | 9.8 | s390x |
| Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle | 9.8 | s390x |
| Red Hat Enterprise Linux for IBM z Systems - 4 years of updates | 9.8 | s390x |
| Red Hat Enterprise Linux for ARM 64 | 9 | aarch64 |
| Red Hat Enterprise Linux for ARM 64 - Extended Update Support | 9.8 | aarch64 |
| Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle | 9.8 | aarch64 |
| Red Hat Enterprise Linux for ARM 64 - 4 years of updates | 9.8 | aarch64 |
| Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions | 9.8 | ppc64le |
Updated Packages
- gnutls-c++-3.8.10-4.el9_8.x86_64.rpm
- gnutls-debugsource-3.8.10-4.el9_8.s390x.rpm
- gnutls-dane-debuginfo-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-c++-debuginfo-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-debugsource-3.8.10-4.el9_8.i686.rpm
- gnutls-devel-3.8.10-4.el9_8.aarch64.rpm
- gnutls-utils-debuginfo-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-utils-3.8.10-4.el9_8.s390x.rpm
- gnutls-3.8.10-4.el9_8.s390x.rpm
- gnutls-c++-3.8.10-4.el9_8.s390x.rpm
- gnutls-debugsource-3.8.10-4.el9_8.x86_64.rpm
- gnutls-devel-3.8.10-4.el9_8.i686.rpm
- gnutls-3.8.10-4.el9_8.i686.rpm
- gnutls-3.8.10-4.el9_8.x86_64.rpm
- gnutls-dane-debuginfo-3.8.10-4.el9_8.x86_64.rpm
- gnutls-debugsource-3.8.10-4.el9_8.aarch64.rpm
- gnutls-debugsource-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-utils-3.8.10-4.el9_8.aarch64.rpm
- gnutls-dane-debuginfo-3.8.10-4.el9_8.i686.rpm
- gnutls-utils-3.8.10-4.el9_8.x86_64.rpm
- gnutls-dane-debuginfo-3.8.10-4.el9_8.s390x.rpm
- gnutls-utils-debuginfo-3.8.10-4.el9_8.i686.rpm
- gnutls-utils-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-c++-debuginfo-3.8.10-4.el9_8.aarch64.rpm
- gnutls-debuginfo-3.8.10-4.el9_8.aarch64.rpm
- gnutls-debuginfo-3.8.10-4.el9_8.x86_64.rpm
- gnutls-utils-debuginfo-3.8.10-4.el9_8.x86_64.rpm
- gnutls-c++-debuginfo-3.8.10-4.el9_8.i686.rpm
- gnutls-c++-debuginfo-3.8.10-4.el9_8.x86_64.rpm
- gnutls-devel-3.8.10-4.el9_8.s390x.rpm
- gnutls-debuginfo-3.8.10-4.el9_8.i686.rpm
- gnutls-debuginfo-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-c++-3.8.10-4.el9_8.i686.rpm
- gnutls-c++-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-c++-debuginfo-3.8.10-4.el9_8.s390x.rpm
- gnutls-devel-3.8.10-4.el9_8.x86_64.rpm
- gnutls-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-3.8.10-4.el9_8.src.rpm
- gnutls-dane-debuginfo-3.8.10-4.el9_8.aarch64.rpm
- gnutls-dane-3.8.10-4.el9_8.i686.rpm
- gnutls-c++-3.8.10-4.el9_8.aarch64.rpm
- gnutls-dane-3.8.10-4.el9_8.aarch64.rpm
- gnutls-devel-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-utils-debuginfo-3.8.10-4.el9_8.s390x.rpm
- gnutls-dane-3.8.10-4.el9_8.ppc64le.rpm
- gnutls-dane-3.8.10-4.el9_8.x86_64.rpm
- gnutls-dane-3.8.10-4.el9_8.s390x.rpm
- gnutls-debuginfo-3.8.10-4.el9_8.s390x.rpm
- gnutls-utils-debuginfo-3.8.10-4.el9_8.aarch64.rpm
- gnutls-3.8.10-4.el9_8.aarch64.rpm
Fixes
- This content is not included.BZ - 2445763
- This content is not included.BZ - 2450624
- This content is not included.BZ - 2450625
- This content is not included.BZ - 2467279
- This content is not included.BZ - 2467289
- This content is not included.BZ - 2467437
CVEs
- CVE-2026-3832
- CVE-2026-3833
- CVE-2026-5260
- CVE-2026-5419
- CVE-2026-33845
- CVE-2026-33846
- CVE-2026-42009
- CVE-2026-42010
- CVE-2026-42011
- CVE-2026-42012
- CVE-2026-42013
- CVE-2026-42014
- CVE-2026-42015
References
Additional information
- The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
- Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.