| Name | CVE-2025-11683 |
| Description | YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values. There is no indication that the issue leads to accessing memory outside that allocated to the module. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libyaml-syck-perl (PTS) | bullseye | 1.34-1 | vulnerable |
| bookworm, trixie | 1.34-2 | vulnerable |
| forky | 1.34-3 | vulnerable |
| sid | 1.34-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libyaml-syck-perl | source | (unstable) | 1.34-4 | | | |
Notes
[trixie] - libyaml-syck-perl <no-dsa> (Minor issue)
[bookworm] - libyaml-syck-perl <no-dsa> (Minor issue)
https://github.com/cpan-authors/YAML-Syck/pull/65
https://github.com/cpan-authors/YAML-Syck/commit/dcf4c8477b82ef439f43fd20dc099082d096df02 (v1.36)