High severity8.8NVD Advisory· Published Jan 22, 2020· Updated Jun 17, 2026
CVE-2019-20393
CVE-2019-20393
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. 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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*+ 11 more
- cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*
- cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*
- (no CPE)range: <1.0-r1
- libyang/libyangdescription
Patches
Vulnerability mechanics
References
5- bugzilla.redhat.com/show_bug.cginvdIssue TrackingPatchThird Party Advisory
- github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ednvdPatchThird Party Advisory
- github.com/CESNET/libyang/issues/742nvdExploitThird Party Advisory
- github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/09/msg00019.htmlnvd
News mentions
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