DEBIAN-CVE-2026-4177
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-4177
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4177.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-4177
- Upstream
- Downstream
- Published
- 2026-03-16T23:16:21Z
- Modified
- 2026-09-14T17:03:11Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter. The heap overflow occurs when class names exceed the initial 512-byte allocation. The base64 decoder could read past the buffer end on trailing newlines. strtok mutated n->type_id in place, corrupting shared node data. A memory leak occurred in syck_hdlr_add_anchor when a node already had an anchor. The incoming anchor string 'a' was leaked on early return.
- References
Affected packages
Debian:12 / libyaml-syck-perl
Package
- Name
- libyaml-syck-perl
- Purl
- pkg:deb/debian/libyaml-syck-perl?arch=source&distro=bookworm
Debian:13 / libyaml-syck-perl
Package
- Name
- libyaml-syck-perl
- Purl
- pkg:deb/debian/libyaml-syck-perl?arch=source&distro=trixie
Debian:14 / libyaml-syck-perl
Package
- Name
- libyaml-syck-perl
- Purl
- pkg:deb/debian/libyaml-syck-perl?arch=source&distro=forky