CVE-2018-25021
CVSS v3
7.5
HIGH
EPSS Score
2.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
The TCP Server module in toxcore before 0.2.8 doesn't free the TCP priority queue under certain conditions, which allows a remote attacker to exhaust the system's memory, causing a denial of service (DoS).
Technical details
- Published
- 2021-12-13
Frequently asked questions
What is CVE-2018-25021?
The TCP Server module in toxcore before 0.2.8 doesn't free the TCP priority queue under certain conditions, which allows a remote attacker to exhaust the system's memory, causing a denial of service (DoS).
Is CVE-2018-25021 actively exploited?
Active exploitation of CVE-2018-25021 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-25021?
CVE-2018-25021 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2018-25021 affecting your environment?
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