DEBIAN-CVE-2026-13713
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-13713
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-13713.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-13713
- Upstream
- Published
- 2026-07-16T22:16:59Z
- Modified
- 2026-09-01T16:06:27Z
- Severity
-
- 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
YAML::Syck versions before 1.47 for Perl allow a use-after-free and double-free via an anchor node freed while still on the parser value stack. In the bundled libsyck, when an anchor name is redefined or removed, syck_hdlr_add_anchor and syck_hdlr_remove_anchor free the node stored under that name with syck_free_node. That node can still be live on the parser's value stack, so syck_hdlr_add_node reaches it again and frees it a second time. On a normal build the 48-byte node chunk is freed twice and the interpreter aborts. Anchors need no special flags, so this is reached on the default Load path, and a 7-byte document that redefines an anchor triggers it. Any caller that runs Load or LoadFile on an untrusted document that redefines an anchor mid-parse crashes the interpreter, a denial of service.
- 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