--- id: CVE-2026-5419 title: A flaw was found in gnutls summary: >- 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 ob… severity: low cvss: 3.7 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N' cwe: - CWE-208 published: '2026-06-01' updated: '2026-06-29' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5419' references: - url: 'https://access.redhat.com/errata/RHSA-2026:20612' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:20613' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:26319' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:26409' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:29197' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:30004' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:32962' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-5419' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2467686' label: secalert@redhat.com - url: 'https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-13' label: secalert@redhat.com - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5419.json - url: 'https://www.cve.org/CVERecord?id=CVE-2026-5419' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5419' - url: 'https://access.redhat.com/errata/RHSA-2026:13274' - url: 'https://access.redhat.com/errata/RHSA-2026:58981' tags: - nvd - csaf - vex - red-hat epss: 0.00578 epssPercentile: 0.4521 ingestedAt: '2026-06-29T13:42:11.966Z' vendor: Red Hat product: Red Hat Enterprise Linux AppStream E4S (v.9.4) affected: - enterprise_linux 6 - enterprise_linux 8 - openshift_container_platform 4 - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_eus_v_10_0 - enterprise_linux_baseos_v_10 - enterprise_linux_baseos_e4s_v_9_4 - enterprise_linux_baseos_eus_v_9_6 - enterprise_linux_baseos_v_9 - discovery 2 - hardened_images - update_infrastructure 5 patched: - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_eus_v_10_0 - enterprise_linux_baseos_v_10 - enterprise_linux_baseos_e4s_v_9_4 - enterprise_linux_baseos_eus_v_9_6 - enterprise_linux_baseos_v_9 - discovery 2 - hardened_images - update_infrastructure 5 --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:26409** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · released 2026-06-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:26409) - **RHSA-2026:20613** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:20613) - **RHSA-2026:32962** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4) · released 2026-06-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:32962) - **RHSA-2026:30004** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6) · released 2026-06-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:30004) - **RHSA-2026:20612** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9) · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:20612) - **RHSA-2026:29197** · Red Hat · fixed in: Red Hat Discovery 2 · released 2026-06-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:29197) - **RHSA-2026:13274** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-05-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:13274) - **RHSA-2026:58981** · Red Hat · fixed in: Red Hat Update Infrastructure 5 · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58981) - **RHSA-2026:26319** · Red Hat · fixed in: Red Hat Update Infrastructure 5 · released 2026-06-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:26319) - **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5419.json)