RLSA-2026:93471: Important: perl-YAML:1.24 security update

Q: What attacker input is relevant to these flaws?

Exploitation involves crafted YAML documents. Applications that deserialize YAML input are the relevant exposure point.

Q: What could an attacker achieve if exploitation succeeds?

The listed fixes address arbitrary code execution through unrestricted package variable assignment and arbitrary destructor method execution. The advisory rates the update high severity, with impacts to confidentiality, integrity, and availability.

Published Nov 3, 2026

Updated

he perl-YAML package provides the pure-Perl implementation of the YAML (YAML Ain't Markup Language) data serialization standard. It allows developers to serialize Perl data structures into formatted YAML text and deserialize YAML data back into native Perl structures, making it widely used for configuration files, data exchange, and human-readable data storage in Perl applications.

Security Fix(es):

perl-yaml: perl-yaml: Arbitrary code execution via unrestricted package variable assignment (CVE-2019-25777)

perl-yaml: perl-yaml: Arbitrary destructor method execution via crafted YAML document (CVE-2017-20285)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

4 affected componentsFixes available

rocky-linux/perl-yaml<0:1.24-4.module+el8.10.0+40403+bd06a93a

0:1.24-4.module+el8.10.0+40403+bd06a93a

rocky-linux/perl-yaml<0:1.24-4.module+el8.10.0+40403+df14587c

0:1.24-4.module+el8.10.0+40403+df14587c

rocky-linux/perl-yaml<0:1.24-4.module+el8.10.0+40403+94558160

0:1.24-4.module+el8.10.0+40403+94558160

rocky-linux/perl-yaml<0:1.24-4.module+el8.10.0+40403+9457ea6c

0:1.24-4.module+el8.10.0+40403+9457ea6c

Event History

Nov 3, 2026

Advisory Published

via OSV·12:01 PM

Data Sourced

via OSV·12:01 PM

DescriptionSeverityAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

What attacker input is relevant to these flaws?

Exploitation involves crafted YAML documents. Applications that deserialize YAML input are the relevant exposure point.

What could an attacker achieve if exploitation succeeds?

The listed fixes address arbitrary code execution through unrestricted package variable assignment and arbitrary destructor method execution. The advisory rates the update high severity, with impacts to confidentiality, integrity, and availability.

RLSA-2026:93471: Important: perl-YAML:1.24 security update

Affected Software

Event History

Child vulnerabilities

Frequently Asked Questions

What attacker input is relevant to these flaws?

What could an attacker achieve if exploitation succeeds?

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Frequently Asked Questions

What attacker input is relevant to these flaws?

What could an attacker achieve if exploitation succeeds?