Bug 2448281

Summary: CVE-2026-4177 perl-YAML-Syck: YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter [fedora-all]
Product: [Fedora] Fedora Reporter: Jon Moroney <jmoroney>
Component: perl-YAML-SyckAssignee: Paul Howarth <paul>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: paul, perl-devel, steve
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["c87873d9-db61-4915-877a-b84144884cf7"]}
Fixed In Version: perl-YAML-Syck-1.37-1.fc45 perl-YAML-Syck-1.39-1.fc44 perl-YAML-Syck-1.39-1.fc43 perl-YAML-Syck-1.39-1.fc42 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-03-31 00:16:49 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2448277    

Description Jon Moroney 2026-03-16 23:36:01 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.

Comment 1 Fedora Update System 2026-03-19 17:54:54 UTC
FEDORA-2026-3572f7e01c (perl-YAML-Syck-1.37-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3572f7e01c

Comment 2 Fedora Update System 2026-03-19 17:54:55 UTC
FEDORA-2026-a8d89d8ae2 (perl-YAML-Syck-1.37-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a8d89d8ae2

Comment 3 Fedora Update System 2026-03-20 01:27:06 UTC
FEDORA-2026-a8d89d8ae2 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-a8d89d8ae2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a8d89d8ae2

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

Comment 4 Fedora Update System 2026-03-20 01:50:34 UTC
FEDORA-2026-d226775800 has been pushed to the Fedora 42 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-d226775800`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d226775800

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

Comment 5 Fedora Update System 2026-03-20 02:08:25 UTC
FEDORA-2026-3572f7e01c 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-2026-3572f7e01c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3572f7e01c

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

Comment 6 Fedora Update System 2026-03-23 01:30:55 UTC
FEDORA-2026-3572f7e01c 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-2026-3572f7e01c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3572f7e01c

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

Comment 7 Fedora Update System 2026-03-23 01:48:11 UTC
FEDORA-2026-a8d89d8ae2 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-a8d89d8ae2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a8d89d8ae2

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

Comment 8 Fedora Update System 2026-03-23 02:09:34 UTC
FEDORA-2026-d226775800 has been pushed to the Fedora 42 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-d226775800`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d226775800

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

Comment 9 Fedora Update System 2026-03-31 00:16:49 UTC
FEDORA-2026-a8d89d8ae2 (perl-YAML-Syck-1.39-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-03-31 00:53:43 UTC
FEDORA-2026-3572f7e01c (perl-YAML-Syck-1.39-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-03-31 01:08:45 UTC
FEDORA-2026-d226775800 (perl-YAML-Syck-1.39-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.