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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-44673", "lastModified": "2026-05-15T15:16:53.830", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-14T21:16:47.500", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob", "id": "2477617", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477617"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["A flaw was found in libyang, a YANG data modeling language library. An integer overflow in the `lyb_read_string()` function can lead to a heap buffer overflow when parsing a maliciously crafted LYB binary blob. A remote attacker, by supplying this malicious LYB data to any libyang consumer (such as a NETCONF server), could trigger a crash, resulting in a denial of service (DoS), or potentially achieve arbitrary code execution through heap corruption."], "name": "CVE-2026-44673", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "libyang", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "libyang", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libyang", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-14T20:35:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-44673\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44673\nhttps://github.com/CESNET/libyang/security/advisories/GHSA-vw2p-pq79-92xh"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,SO 5.2.15)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "libyang", "source": "cna", "vendor": "CESNET"}, "product": "libyang", "vendor": "cesnet"}], "created": "2026-05-14T21:30:12.138136+00:00", "updated": "2026-05-14T21:30:12.555652+00:00", "vendors": ["cesnet", "cesnet$PRODUCT$libyang"]}