CVE-2026-44673

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh
https://access.redhat.com/errata/RHSA-2026:24545
https://access.redhat.com/errata/RHSA-2026:24758
https://access.redhat.com/errata/RHSA-2026:25051
https://access.redhat.com/security/cve/CVE-2026-44673
https://bugzilla.redhat.com/show_bug.cgi?id=2477617
https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44673.json

Configurations

No configuration.

History

30 Jun 2026, 03:20

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:24545 - () https://access.redhat.com/errata/RHSA-2026:24758 - () https://access.redhat.com/errata/RHSA-2026:25051 - () https://access.redhat.com/security/cve/CVE-2026-44673 - () https://bugzilla.redhat.com/show_bug.cgi?id=2477617 - () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44673.json -

15 May 2026, 15:16

Type	Values Removed	Values Added
References	~~() https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh -~~	() https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh -

14 May 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-14 21:16

Updated : 2026-07-15 02:22

NVD link : CVE-2026-44673

Mitre link : CVE-2026-44673

CVE.ORG link : CVE-2026-44673

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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