CVE-2026-44673
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| CESNET | libyang | < SO 5.2.15 | affected |
Weaknesses
- CWE-190: CWE-190: Integer Overflow or Wraparound
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
Additional References
libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob
Additional References
- 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
- https://access.redhat.com/errata/RHSA-2026:24758
- https://access.redhat.com/errata/RHSA-2026:24545
- https://access.redhat.com/errata/RHSA-2026:25051
References
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