CRITICAL
CVE-2020-6838
CVSS v3
9.8
CRITICAL
EPSS Score
1.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In mruby 2.1.0, there is a use-after-free in hash_values_at in mrbgems/mruby-hash-ext/src/hash-ext.c.
Technical details
- Published
- 2020-01-11
Frequently asked questions
What is CVE-2020-6838?
In mruby 2.1.0, there is a use-after-free in hash_values_at in mrbgems/mruby-hash-ext/src/hash-ext.c.
Is CVE-2020-6838 actively exploited?
Active exploitation of CVE-2020-6838 has not been confirmed. Its EPSS score was 1.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-6838?
CVE-2020-6838 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2020-6838 affecting your environment?
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