DEBIAN-CVE-2026-44673

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Source
https://security-tracker.debian.org/tracker/CVE-2026-44673
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44673.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-44673
Upstream
  • CVE-2026-44673
Published
2026-05-14T21:16:47Z
Modified
2026-09-10T08:47:25Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.

References

Affected packages

Debian:13 / libyang

Package

Name
libyang
Purl
pkg:deb/debian/libyang?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.12.2-1
3.13.5-1
3.13.5-2
3.13.6-1~bpo13+1
3.13.6-1
4.*
4.2.2-1
4.2.2-2
4.2.2-3
4.3.3-1
4.3.4-1
4.7.3-1
5.*
5.0.2-1
5.0.8-1
5.4.1-1
5.4.1+really5.4.1-1
5.4.5-1
5.4.9-1
5.7.1-1
5.8.5-1
5.8.6-1
5.8.6-2
6.*
6.1.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44673.json"

Debian:14 / libyang

Package

Name
libyang
Purl
pkg:deb/debian/libyang?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.12.2-1
3.13.5-1
3.13.5-2
3.13.6-1~bpo13+1
3.13.6-1
4.*
4.2.2-1
4.2.2-2
4.2.2-3
4.3.3-1
4.3.4-1
4.7.3-1
5.*
5.0.2-1
5.0.8-1
5.4.1-1
5.4.1+really5.4.1-1
5.4.5-1
5.4.9-1
5.7.1-1
5.8.5-1
5.8.6-1
5.8.6-2
6.*
6.1.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44673.json"

Debian:12 / libyang2

Package

Name
libyang2
Purl
pkg:deb/debian/libyang2?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.30-2
2.1.30-2.1~exp1
2.1.30-2.1
2.1.148-0.1
2.1.148-0.2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44673.json"