Vulnerability in Cesnet Libyang
CVE-2021-28902
In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. In some cases, it can be NULL, which leads to the operation of retval->ext[r]->flags that results in a crash.
EPSS: 0.016 (72.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Cesnet Libyang
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Exploit, Third Party Advisory, Issue Tracking)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-28902?
- CVE-2021-28902 is a high-severity vulnerability in Cesnet Libyang, classified under CWE-252. CVSS score: 7.5/10. Published 2021-05-20.
- How severe is CVE-2021-28902?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-28902 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.