Bug 2559971 - CVE-2026-93601 asciinema: rustls-webpki: Name Constraint Bypass in wildcard certificate validation [fedora-all]
Summary: CVE-2026-93601 asciinema: rustls-webpki: Name Constraint Bypass in wildcard c...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: asciinema
Version: rawhide
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Gustavo Costa
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["94568926-7455-4c8f-8f71-6...
Depends On:
Blocks: CVE-2026-93601
TreeView+ depends on / blocked
 
Reported: 2026-10-23 15:51 UTC by Ronit Dey
Modified: 2026-11-02 01:45 UTC (History)
3 users (show)

Fixed In Version: asciinema-3.2.0-5.fc45 asciinema-3.0.0-8.fc44 asciinema-3.0.0-8.fc43
Clone Of:
Environment:
Last Closed: 2026-11-02 00:56:41 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Ronit Dey 2026-10-23 15:51:26 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 21:05:04 UTC
FEDORA-2026-d0727c4729 (asciinema-3.2.0-5.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d0727c4729

Comment 2 Fedora Update System 2026-10-24 21:05:05 UTC
FEDORA-2026-050bc124df (asciinema-3.0.0-8.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-050bc124df

Comment 3 Fedora Update System 2026-10-24 21:05:05 UTC
FEDORA-2026-884487ccab (asciinema-3.0.0-8.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-884487ccab

Comment 4 Fedora Update System 2026-10-25 02:05:35 UTC
FEDORA-2026-d0727c4729 has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-d0727c4729`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d0727c4729

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 02:21:50 UTC
FEDORA-2026-884487ccab has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-884487ccab`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-884487ccab

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 02:27:18 UTC
FEDORA-2026-050bc124df has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-050bc124df`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-050bc124df

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

Comment 7 Fedora Update System 2026-11-02 00:56:41 UTC
FEDORA-2026-d0727c4729 (asciinema-3.2.0-5.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-11-02 01:29:26 UTC
FEDORA-2026-884487ccab (asciinema-3.0.0-8.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-11-02 01:45:57 UTC
FEDORA-2026-050bc124df (asciinema-3.0.0-8.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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