# CVE-2021-4185: wireshark: Infinite loop in the RTMPT dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injec...

CVE-2021-4185 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2021-4185, released December 30, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-4185
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0406
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2021

## Description

Infinite loop in the RTMPT dissector in Wireshark 3.6.0 and 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libwireshark-data Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [libwireshark-data 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwireshark-data-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | libwireshark11 Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [libwireshark11 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwireshark11-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | libwiretap8 Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [libwiretap8 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwiretap8-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | libwscodecs2 Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [libwscodecs2 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwscodecs2-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | libwsutil9 Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [libwsutil9 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwsutil9-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | tshark Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [tshark 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tshark-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | wireshark Debian 12.15 (bookworm) | 3.6.2-1 | [DEBIAN-CVE-2021-4185](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4185.md) | Dec 30, 2021 |
| Linux | wireshark Debian 13.5 (trixie) | 3.6.2-1 | [DEBIAN-CVE-2021-4185](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4185.md) | Dec 30, 2021 |
| Linux | wireshark Debian 14 | 3.6.2-1 | [DEBIAN-CVE-2021-4185](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4185.md) | Dec 30, 2021 |
| Linux | wireshark Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [wireshark 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | wireshark-cli amzn 2023 | 1:4.0.2-1.amzn2023.0.2 | [ALAS2023-2023-038](https://patchblox.com/security/data/fix/linux/alas2023-2023-038.md) | Feb 17, 2023 |
| Linux | wireshark-cli-debuginfo amzn 2023 | 1:4.0.2-1.amzn2023.0.2 | [ALAS2023-2023-038](https://patchblox.com/security/data/fix/linux/alas2023-2023-038.md) | Feb 17, 2023 |
| Linux | wireshark-common Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [wireshark-common 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-common-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | wireshark-debugsource amzn 2023 | 1:4.0.2-1.amzn2023.0.2 | [ALAS2023-2023-038](https://patchblox.com/security/data/fix/linux/alas2023-2023-038.md) | Feb 17, 2023 |
| Linux | wireshark-devel amzn 2023 | 1:4.0.2-1.amzn2023.0.2 | [ALAS2023-2023-038](https://patchblox.com/security/data/fix/linux/alas2023-2023-038.md) | Feb 17, 2023 |
| Linux | wireshark-gtk Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [wireshark-gtk 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-gtk-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |
| Linux | wireshark-qt Ubuntu 18.04.6 LTS (bionic) | 2.6.10-1~ubuntu18.04.0+esm2 | [wireshark-qt 2.6.10-1~ubuntu18.04.0+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-qt-2.6.10-1-ubuntu18.04.0-esm2.md) | Feb 14, 2022 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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