CVE-2019-6706
CVSS v3
7.5
HIGH
EPSS Score
17.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.
Technical details
- Published
- 2019-01-23
- Exploit-DB
- EDB-46246
Frequently asked questions
What is CVE-2019-6706?
Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have certain relationships.
Is CVE-2019-6706 actively exploited?
Active exploitation of CVE-2019-6706 has not been confirmed. Its EPSS score was 17.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-6706?
CVE-2019-6706 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2019-6706 affecting your environment?
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