DEBIAN-CVE-2026-4177

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-4177
Published: 16 Mar 2026, 23:16
Last modified:17 Mar 2026, 08:48

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

16 Mar 2026, 23:16
Published
Vulnerability first disclosed
17 Mar 2026, 08:48
Last Modified
Vulnerability information updated

Description

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.

Affected Systems

  • debian•libyaml-syck-perl

    all | all | all | all

References (1)