vulnerability
Ubuntu: (CVE-2019-20398): libyang vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:N/A:P) | Jan 22, 2020 | Jun 26, 2025 | Jun 26, 2025 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:P)
Published
Jan 22, 2020
Added
Jun 26, 2025
Modified
Jun 26, 2025
Description
A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
Solution
no-fix-ubuntu-package
References
- CVE-2019-20398
- https://attackerkb.com/topics/CVE-2019-20398
- URL-https://bugzilla.redhat.com/show_bug.cgi?id=1793935
- URL-https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08
- URL-https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3
- URL-https://github.com/CESNET/libyang/issues/773
- URL-https://www.cve.org/CVERecord?id=CVE-2019-20398
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