What’s Vulnerable › Vulnerabilities

CVE-2021-28906

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-20 · updated 2026-06-17
• Weakness: CWE-252

Description

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.

Affected products

• CESNET libyang: through 1.0.225

References

• https://github.com/CESNET/libyang/issues/1455
• https://security.gentoo.org/glsa/202107-54
• https://github.com/CESNET/libyang/issues/1455
• https://security.gentoo.org/glsa/202107-54

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