# CVE-2018-18226: libwireshark11: In Wireshark 2.6.0 to 2.6.3, the Steam IHS Discovery dissector could consume system memory

CVE-2018-18226 is fixed in 10 products on 1 platform, first by libwireshark-data 2.6.4-2~ubuntu18.04.0, released October 11, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-18226
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0317
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 11, 2018

## Description

In Wireshark 2.6.0 to 2.6.3, the Steam IHS Discovery dissector could consume system memory. This was addressed in epan/dissectors/packet-steam-ihs-discovery.c by changing the memory-management approach.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libwireshark-data Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [libwireshark-data 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwireshark-data-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | libwireshark11 Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [libwireshark11 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwireshark11-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | libwiretap8 Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [libwiretap8 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwiretap8-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | libwscodecs2 Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [libwscodecs2 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwscodecs2-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | libwsutil9 Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [libwsutil9 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libwsutil9-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | tshark Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [tshark 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tshark-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | wireshark Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [wireshark 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | wireshark-common Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [wireshark-common 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-common-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | wireshark-gtk Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [wireshark-gtk 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-gtk-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |
| Linux | wireshark-qt Ubuntu 18.04.6 LTS (bionic) | 2.6.4-2~ubuntu18.04.0 | [wireshark-qt 2.6.4-2~ubuntu18.04.0](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-wireshark-qt-2.6.4-2-ubuntu18.04.0.md) | Oct 11, 2018 |

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Data as of 2026-11-07T18:46:35Z 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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