CVE-2021-28902

7.5 highEPSS 1.6%

High (7.5) in cesnet libyang. EPSS 1.6% chance of exploitation in the next 30 days.

In function read_yin_container() 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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.6% chance of exploitation in the next 30 days; higher than 75% of CVEs (scores of 2026-10-31)
CWE: CWE-252
Published: 2021-05-20
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

cesnet:libyang

References

https://github.com/CESNET/libyang/issues/1454
https://security.gentoo.org/glsa/202107-54
https://github.com/CESNET/libyang/issues/1454
https://security.gentoo.org/glsa/202107-54

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