Bug 2559937 - CVE-2026-93601 ntpd-rs: rustls-webpki: Name Constraint Bypass in wildcard certificate validation [epel-all]
Summary: CVE-2026-93601 ntpd-rs: rustls-webpki: Name Constraint Bypass in wildcard cer...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: ntpd-rs
Version: epel10
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Fabio Valentini
QA Contact:
URL:
Whiteboard: {"flaws": ["94568926-7455-4c8f-8f71-6...
Depends On:
Blocks: CVE-2026-93601
TreeView+ depends on / blocked
 
Reported: 2026-10-23 15:31 UTC by Ronit Dey
Modified: 2026-11-02 01:40 UTC (History)
2 users (show)

Fixed In Version: ntpd-rs-1.7.2-3.el10_3 ntpd-rs-1.7.2-3.el10_4 ntpd-rs-1.7.2-3.el10_2
Clone Of:
Environment:
Last Closed: 2026-10-27 00:33:31 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Ronit Dey 2026-10-23 15:31:45 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

rustls-webpki (the Rust webpki fork used by rustls) versions >= 0.101.0 and prior to 0.103.12 and 0.104.0-alpha.6 incorrectly accepted permitted-subtree DNS name constraints for certificates asserting a wildcard name. For example, a name constraint of accept.example.com was treated as satisfied by a certificate for *.example.com, which could feasibly assert reject.example.com — a name outside the permitted subtree. Because name constraints are restrictions applied to otherwise properly issued certificates, the issue is only reachable after signature verification succeeds and requires a misissued wildcard certificate to exploit.

Comment 1 Fedora Update System 2026-10-24 15:23:55 UTC
FEDORA-EPEL-2026-997c3eec6e (ntpd-rs-1.7.2-3.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-997c3eec6e

Comment 2 Fedora Update System 2026-10-24 15:24:03 UTC
FEDORA-EPEL-2026-3e71d1624f (ntpd-rs-1.7.2-3.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3e71d1624f

Comment 3 Fedora Update System 2026-10-24 15:24:04 UTC
FEDORA-EPEL-2026-99a4ebafd3 (ntpd-rs-1.7.2-3.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-99a4ebafd3

Comment 4 Fedora Update System 2026-10-25 02:33:44 UTC
FEDORA-EPEL-2026-997c3eec6e has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-997c3eec6e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-10-25 02:34:12 UTC
FEDORA-EPEL-2026-99a4ebafd3 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-99a4ebafd3

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-10-25 02:35:03 UTC
FEDORA-EPEL-2026-3e71d1624f has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3e71d1624f

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-10-27 00:33:31 UTC
FEDORA-EPEL-2026-99a4ebafd3 (ntpd-rs-1.7.2-3.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-11-02 01:11:42 UTC
FEDORA-EPEL-2026-3e71d1624f (ntpd-rs-1.7.2-3.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-11-02 01:40:51 UTC
FEDORA-EPEL-2026-997c3eec6e (ntpd-rs-1.7.2-3.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.


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