CVE-2026-5419

LOW

gnutls - Observable Timing Discrepancy in PKCS#7 Padding Check

Title source: llm

Description

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.

References (11)

Core 11

Core References

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:20612

https://access.redhat.com/errata/RHSA-2026:20612

Vendor Advisory vdb-entry x_refsource_redhat

https://access.redhat.com/security/cve/CVE-2026-5419

Vendor Advisory issue-tracking x_refsource_redhat

https://bugzilla.redhat.com/show_bug.cgi?id=2467686

Vendor Advisory vendor-advisory x_refsource_redhat

https://access.redhat.com/errata/RHSA-2026:20613

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:26319

https://access.redhat.com/errata/RHSA-2026:26319

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:26409

https://access.redhat.com/errata/RHSA-2026:26409

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:29197

https://access.redhat.com/errata/RHSA-2026:29197

https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-13

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:30004

https://access.redhat.com/errata/RHSA-2026:30004

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:32962

https://access.redhat.com/errata/RHSA-2026:32962

Vendor Advisory vendor-advisory x_refsource_redhat

RHSA-2026:13274

https://access.redhat.com/errata/RHSA-2026:13274

Scores

CVSS v3 3.7

EPSS 0.0038

EPSS Percentile 30.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-208

Status published

Products (17)

Red Hat/Red Hat Discovery 2 1782159791

Red Hat/Red Hat Discovery 2 1782166952

Red Hat/Red Hat Enterprise Linux 10 0:3.8.10-4.el10_2

Red Hat/Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.8.9-9.el10_0.19

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 Enterprise Linux 9 0:3.8.10-4.el9_8

Red Hat/Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:3.8.3-4.el9_4.6

Red Hat/Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.8.3-6.el9_6.4

... and 7 more

Published Jun 01, 2026

Tracked Since Jun 02, 2026