Home / mailings [gentoo-announce] [ GLSA 202610-01 ] ca-certificates: Compromised Intermediate Certificate Authority
Posted on 21 October 2026
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Gentoo Linux Security Advisory GLSA 202610-01
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https://security.gentoo.org/
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Severity: High
Title: ca-certificates: Compromised Intermediate Certificate Authority
Date: October 21, 2026
Bugs: #984601
ID: 202610-01
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Synopsis
========
A vulnerability has been discovered in ca-certificates where an
intermediate Certificate Authority has been compromised.
Background
==========
For more information on the packages listed in this GLSA, please see
their homepage referenced in the ebuild.
Affected packages
=================
Package Vulnerable Unaffected
------------------------ ---------------- -----------------
app-misc/ca-certificates < 20260816.3.125 >= 20260816.3.125
Description
===========
A vulnerability has been discovered in ca-certificates. Please review
the CVE identifier referenced below for details.
Impact
======
Man-in-the-middle (MITM) attacks are possible using the compromised
authority key.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All ca-certificates users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-misc/ca-certificates-20260816.3.125"
References
==========
[ 1 ] CVE-2026-111943
https://nvd.nist.gov/vuln/detail/CVE-2026-111943
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202610-01
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2026 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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