Bug 2467686 (CVE-2026-5419) - CVE-2026-5419 gnutls: gnutls: Information disclosure via timing side-channel in PKCS#7 padding removal
Summary: CVE-2026-5419 gnutls: gnutls: Information disclosure via timing side-channel ...
Keywords:
Status: NEW
Alias: CVE-2026-5419
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-07 11:04 UTC by OSIDB Bzimport
Modified: 2026-06-30 12:14 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:26409 0 None None None 2026-06-16 16:39:32 UTC
Red Hat Product Errata RHSA-2026:30004 0 None None None 2026-06-25 18:07:43 UTC
Red Hat Product Errata RHSA-2026:32962 0 None None None 2026-06-29 09:47:16 UTC

Description OSIDB Bzimport 2026-05-07 11:04:01 UTC 
libgnutls: Fix timing side-channel in PKCS#7 padding removal
The PKCS#7 padding check performed during decryption was not constant-time,
potentially leaking information about the padding bytes
through timing differences.
Rewritten to remove padding in a branch-free manner.
Comment 3 errata-xmlrpc 2026-06-16 16:39:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:26409 https://access.redhat.com/errata/RHSA-2026:26409
Comment 5 errata-xmlrpc 2026-06-25 18:07:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:30004 https://access.redhat.com/errata/RHSA-2026:30004
Comment 6 errata-xmlrpc 2026-06-29 09:47:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

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