Description
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted Online Certificate Status Protocol (OCSP) response during a TLS handshake. Due to a logic error in how gnutls processes multi-record OCSP responses, a client with OCSP verification enabled may incorrectly accept a revoked server certificate, potentially leading to a compromise of trust.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | gnutls | < 3.8.13 | 3.8.13 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | — | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — | — |
| Red Hat | Red Hat Discovery 2 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Update Infrastructure 5 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gnutls28 | 3.8.13-1 | — |
| Debian 13 | gnutls28 | 3.8.9-3+deb13u4 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | gnutls28 | 3.8.12-2ubuntu1.1 | — |
| Ubuntu 25.10 | gnutls28 | 3.8.9-3ubuntu2.2 | — |
| Ubuntu 24.04 LTS | gnutls28 | 3.8.3-1.1ubuntu3.6 | — |
| Ubuntu 22.04 LTS | gnutls28 | 3.7.3-4ubuntu1.9 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 24.04 LTS | gnutls28 | 3.8.3-1.1ubuntu3.6+Fips1.2 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | gnutls28 | 3.7.3-4ubuntu1.9+Fips1 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | gnutls28 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | gnutls +5 | 3.8.10-4.el10_2 | RHSA-2026:20613 |
| RHEL 9 | gnutls +4 | 3.8.10-4.el9_8 | RHSA-2026:20612 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | gnutls +5 | 3.8.9-9.el10_0.19 | RHSA-2026:26409 |
| Red Hat Hardened Images 1 | gnutls +7 | 3.8.13-1.hum1 | RHSA-2026:13274 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | gnutls +5 | 3.8.10-4.el10_2 | ALSA-2026:20613 |
| AlmaLinux 9 | gnutls +4 | 3.8.10-4.el9_8 | ALSA-2026:20612 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | gnutls | 3.8.10-4.el10_2 | RLSA-2026:20613 |
| Rocky Linux 9 | gnutls | 3.8.10-4.el9_8 | RLSA-2026:20612 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | gnutls | 3.8.13-1.1 | openSUSE-SU-2026:10691-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | gnutls | 3.8.13-r0 | — |
| Alpine v3.23 | gnutls | 3.8.13-r0 | — |
| Alpine v3.22 | gnutls | 3.8.13-r0 | — |
| Alpine v3.21 | gnutls | 3.8.13-r0 | — |
| Alpine v3.20 | gnutls | 3.8.13-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | gnutls | 3.8.3-11 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | gnutls +5 | 3.8.10-4.el10_2 | ELSA-2026-20613 |
| Oracle Linux 9 | gnutls +4 | 3.8.10-4.el9_8 | ELSA-2026-50346, ELSA-2026-20612 |
Advisories 15
- WID-SEC-2026-1312 GnuTLS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- ALSA-2026:20613 Important: gnutls security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:20612 Important: gnutls security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-3623 IBM DataPower Gateway: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2026:26409 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:20613 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:20612 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13274 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- NCSC-2026-0431 Kwetsbaarheden verholpen in IBM DataPower Gateway en onderliggende componenten NCSC-NL (Netherlands) · Oct 16, 2026
- ELSA-2026-20613 Important: gnutls security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 17, 2026
- ELSA-2026-50346 Important: gnutls security fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 24, 2026
- ELSA-2026-20612 Important: gnutls security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 24, 2026
- RLSA-2026:20613 Important: gnutls security update Rocky Linux Security Advisories · Jun 5, 2026
- RLSA-2026:20612 Important: gnutls security update Rocky Linux Security Advisories · Jun 2, 2026
- openSUSE-SU-2026:10691-1 gnutls-3.8.13-1.1 on GA media SUSE / openSUSE Security Updates · May 6, 2026
References
- RHSA-2026:13274 vendor-advisory
- RHSA-2026:20612 vendor-advisory
- RHSA-2026:20613 vendor-advisory
- RHSA-2026:26319 vendor-advisory
- RHSA-2026:26409 vendor-advisory
- RHSA-2026:29197 vendor-advisory
- RHSA-2026:58981 vendor-advisory
- RHSA-2026:72502 vendor-advisory
- RHSA-2026:82304 vendor-advisory
- RHSA-2026:82322 vendor-advisory
- RHSA-2026:82347 vendor-advisory
- RHSA-2026:82354 vendor-advisory
- RHSA-2026:82372 vendor-advisory
- RHSA-2026:82857 vendor-advisory
- RHSA-2026:82888 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-3832 vdb-entry
- RHBZ#2445762 issue-tracking
- https://gitlab.com/gnutls/gnutls/-/issues/1801