CVE-2021-28903
CVSS v3
7.5
HIGH
EPSS Score
2.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2021-05-20
Frequently asked questions
What is 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.
Is CVE-2021-28903 actively exploited?
Active exploitation of CVE-2021-28903 has not been confirmed. Its EPSS score was 2.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-28903?
CVE-2021-28903 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-28903 affecting your environment?
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