CVE-2021-44847
9.8
CRITICAL · CVSS 3.1 · EPSS 4.1% (pctl 91)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by an improper length calculation during the handling of received network packets) allows remote attackers to crash the process or potentially execute arbitrary code via a network packet.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 4.14% — more likely to be exploited than 91% of all CVEs |
| Weakness | CWE-682 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-12-13 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| fedoraproject | fedora |
| toktok | toxcore |
References
- https://github.com/TokTok/c-toxcore/pull/1718
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7EBS3NIRYJ7V3PTNINP3PJSVUHGZTGA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLTKINSPO5T65LB3ZASDPCREKUE22RYE/
- https://github.com/TokTok/c-toxcore/pull/1718
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7EBS3NIRYJ7V3PTNINP3PJSVUHGZTGA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLTKINSPO5T65LB3ZASDPCREKUE22RYE/
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