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CVE-2019-20397
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications…
High8.8EPSS 2.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.5% · top 15% of all CVEs (5 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
n/a
- affected n/a
References (5)
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 (opens in a new tab)x_transferred
- https://github.com/CESNET/libyang/issues/739 (opens in a new tab)x_transferred
- https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4 (opens in a new tab)x_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1793928 (opens in a new tab)x_transferred
- [debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2019-20397)Record last updated .