What is CVE-2021-28903?

CVE-2021-28903 is a high-severity vulnerability in Cesnet Libyang, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2021-05-20.

How severe is CVE-2021-28903?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-28903 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Cesnet Libyang

CVE-2021-28903

A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to crash.

EPSS: 0.024 (82.4th 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)

CWE-674 — Uncontrolled Recursion

Public proof-of-concept exploits

n0-traces/cve_

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-2021-28903?: CVE-2021-28903 is a high-severity vulnerability in Cesnet Libyang, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2021-05-20.
How severe is CVE-2021-28903?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-28903 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.