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Status published
High
CVE-2019-20397
A double-free is present in libyang before v1.0-r1 in the...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1
- https://github.com/CESNET/libyang/issues/739
- https://github.com/CESNET/libyang/commit/88bd6c548ba79bce176cd875e9b56e7e0ef4d8d4
- https://bugzilla.redhat.com/show_bug.cgi?id=1793928
- https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
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Affected Vendor
cesnet
View all reports →Affected Software
libyang
Vulnerable Versions:
0.11, 0.12, 0.13, 0.14, 0.15, 0.16
Timeline
Official Publish:
January 22nd, 2020
Last Modified:
August 5th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.