libtoxcore2: A stack-based buffer overflow in handle_request function in DHT.c intoxcore 0.1.9 through 0.1.11 and 0.2.0 through 0....
CVE-2021-44847 is fixed in 3 products on 1 platform, first by libtoxcore2 0.2.13-1, released December 12, 2021. It is not reported as exploited. Patch Radar priority: High.
A stack-based buffer overflow in handle_request function in DHT.c intoxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by animproper length calculation during the handling of received networkpackets) allows remote attackers to crash the process or potentiallyexecute arbitrary code via a network packet.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtoxcore · Debian 12.15 (bookworm) | 0.2.13-1 | DEBIAN-CVE-2021-44847 | Dec 13, 2021 |
| libtoxcore · Debian 13.5 (trixie) | 0.2.13-1 | DEBIAN-CVE-2021-44847 | Dec 13, 2021 |
| libtoxcore · Debian 14 | 0.2.13-1 | DEBIAN-CVE-2021-44847 | Dec 13, 2021 |
| libtoxcore2 · Ubuntu 22.04.1 LTS (jammy) | 0.2.13-1 | libtoxcore2 0.2.13-1 | Dec 12, 2021 |
| libtoxcore2 · Ubuntu 24.10 (oracular) | 0.2.13-1 | libtoxcore2 0.2.13-1 | Jan 16, 2026 |
| libtoxcore2 · Ubuntu 25.04 (plucky) | 0.2.13-1 | libtoxcore2 0.2.13-1 | Jan 16, 2026 |
| toxcore-utils · Ubuntu 22.04.1 LTS (jammy) | 0.2.13-1 | toxcore-utils 0.2.13-1 | Dec 12, 2021 |
| toxcore-utils · Ubuntu 24.10 (oracular) | 0.2.13-1 | toxcore-utils 0.2.13-1 | Jan 16, 2026 |
| toxcore-utils · Ubuntu 25.04 (plucky) | 0.2.13-1 | toxcore-utils 0.2.13-1 | Jan 16, 2026 |
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