Vulnerability in Cesnet Libyang
CVE-2021-28906
In function read_yin_leaf() 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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.016 (74.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/CESNET/libyang/issues/1455 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/202107-54 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28906?
- CVE-2021-28906 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-2021-28906?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-28906 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.