Public vulnerability disclosure
CVE-2026-5419
Gnutls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal
publishedCWE-208
A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This timing side-channel could allow a remote attacker to potentially leak sensitive information about the padding bytes through observable timing differences. This vulnerability is a form of information disclosure.
Technical severity3.7 lowCVSS 3.1 · CNA: redhat
Published2026-06-01Source updated 2026-11-03
Collected2026-11-032 attributed sources
Fixes and workarounds
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
gnutls
https://gitlab.com/gnutls/gnutls |
0 (affected) | CNA: redhat |
| Red Hat Enterprise Linux 10 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.10-4.el10_2; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.9-9.el10_0.19; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.10-4.el9_8; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.3-4.el9_4.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:3.8.3-6.el9_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791371080; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791371069; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791788287; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.17 Red Hat cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ |
≥ 1791970484; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/jetstack-cert-manager-acmesolver-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459707; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/jetstack-cert-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459711; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-istio-csr-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1791459759; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-operator-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1789029076; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.18 Red Hat cert-manager/cert-manager-operator-bundle
https://catalog.redhat.com/software/containers/ |
≥ 1791966259; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Cert Manager support for Red Hat OpenShift release 1.20 Red Hat cert-manager/cert-manager-trust-manager-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1790598593; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Discovery 2 Red Hat discovery/discovery-server-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1782159791; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Discovery 2 Red Hat discovery/discovery-ui-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1782166952; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Hardened Images Red Hat gnutls-main
https://catalog.redhat.com/software/containers/ |
≥ 3.8.13-1.hum1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift AI 3.4 Red Hat rhai/base-image-neuron-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1790703542; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/cds-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525684; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/haproxy-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525671; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/installer-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525693; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/rhua-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1781525739; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/cds-kubernetes-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787241211; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/installer-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787135742; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Update Infrastructure 5 Red Hat rhui5/rhua-tp-rhel9
https://catalog.redhat.com/software/containers/ |
≥ 1787241260; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat gnutls
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift4/ose-hypershift-rhel9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unaffected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift/ose-rhel-coreos-8
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 4 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat OpenShift Container Platform 5 Red Hat openshift/ose-rhel-coreos-9
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N | CNA: redhat |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2026:13274CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20612CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:20613CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26319CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26409CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29197CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30004CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:32962CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:58981CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:72502CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:74674CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82304CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82322CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82347CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82354CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82372CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82857CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82888CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-5419CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2467686CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-13CNA: redhat
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