CVE-2025-40908

Publication date 1 June 2025

Last updated 5 June 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

YAML-LibYAML prior to 0.903.0 for Perl uses 2-args open, allowing existing files to be modified

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libyaml-libyaml-perl	25.04 plucky	Not affected
	24.10 oracular	Needs evaluation
	24.04 LTS noble	Needs evaluation
	22.04 LTS jammy	Needs evaluation
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libyaml-libyaml-perl	Upstream: 5fe9dae Upstream: https://github.com/ingydotnet/yaml-libyaml-pm/pull/121 Upstream: https://github.com/ingydotnet/yaml-libyaml-pm/pull/122

Severity score breakdown

Parameter	Value
Base score	9.1 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Other references