What’s Vulnerable › Vulnerabilities

CVE-2021-28903

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-20 · updated 2026-06-17
• Weakness: CWE-674

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.

Affected products

• CESNET libyang: through 1.0.225

References

• https://github.com/CESNET/libyang/issues/1453
• https://security.gentoo.org/glsa/202107-54
• https://github.com/CESNET/libyang/issues/1453
• https://security.gentoo.org/glsa/202107-54

Get alerted when CVE-2021-28903 or the next vulnerability affects your stack