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).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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).
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.34% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-404
- Affected
- toktok/toxcore
- Source
- cve@mitre.org
EPSS 2.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://blog.tox.chat/2018/10/memory-leak-bug-and-new-toxcore-release-fixing-it/Third Party Advisory
- https://github.com/TokTok/c-toxcore/issues/1214Exploit, Third Party Advisory
- https://github.com/TokTok/c-toxcore/pull/1216Third Party Advisory
- https://blog.tox.chat/2018/10/memory-leak-bug-and-new-toxcore-release-fixing-it/Third Party Advisory
- https://github.com/TokTok/c-toxcore/issues/1214Exploit, Third Party Advisory
- https://github.com/TokTok/c-toxcore/pull/1216Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.