w3m: There is an out-of-bounds write in checkType located in etc.c in w3m 0.5.3
CVE-2022-38223 is fixed in 2 products on 1 platform, first by w3m 0.5.3-36ubuntu0.1, released August 15, 2022. It is not reported as exploited. Patch Radar priority: High.
There is an out-of-bounds write in checkType located in etc.c in w3m 0.5.3. It can be triggered by sending a crafted HTML file to the w3m binary. It allows an attacker to cause Denial of Service or possibly have unspecified other impact.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| w3m · Debian 12.15 (bookworm) | 0.5.3+git20230121-1 | DEBIAN-CVE-2022-38223 | Aug 15, 2022 |
| w3m · Debian 13.5 (trixie) | 0.5.3+git20230121-1 | DEBIAN-CVE-2022-38223 | Aug 15, 2022 |
| w3m · Debian 14 | 0.5.3+git20230121-1 | DEBIAN-CVE-2022-38223 | Aug 15, 2022 |
| w3m · Ubuntu 18.04.6 LTS (bionic) | 0.5.3-36ubuntu0.1 | w3m 0.5.3-36ubuntu0.1 | Aug 15, 2022 |
| w3m · Ubuntu 20.04 LTS (focal) | 0.5.3-37ubuntu0.1 | w3m 0.5.3-37ubuntu0.1 | Aug 15, 2022 |
| w3m · Ubuntu 22.04.1 LTS (jammy) | 0.5.3+git20210102-6ubuntu0.1 | w3m 0.5.3+git20210102-6ubuntu0.1 | Aug 15, 2022 |
| w3m · Ubuntu 24.10 (oracular) | 0.5.3+git20220429-1ubuntu1 | w3m 0.5.3+git20220429-1ubuntu1 | Jan 16, 2026 |
| w3m · Ubuntu 25.04 (plucky) | 0.5.3+git20220429-1ubuntu1 | w3m 0.5.3+git20220429-1ubuntu1 | Jan 16, 2026 |
| w3m-img · Ubuntu 18.04.6 LTS (bionic) | 0.5.3-36ubuntu0.1 | w3m-img 0.5.3-36ubuntu0.1 | Aug 15, 2022 |
| w3m-img · Ubuntu 20.04 LTS (focal) | 0.5.3-37ubuntu0.1 | w3m-img 0.5.3-37ubuntu0.1 | Aug 15, 2022 |
| w3m-img · Ubuntu 22.04.1 LTS (jammy) | 0.5.3+git20210102-6ubuntu0.1 | w3m-img 0.5.3+git20210102-6ubuntu0.1 | Aug 15, 2022 |
| w3m-img · Ubuntu 24.10 (oracular) | 0.5.3+git20220429-1ubuntu1 | w3m-img 0.5.3+git20220429-1ubuntu1 | Jan 16, 2026 |
| w3m-img · Ubuntu 25.04 (plucky) | 0.5.3+git20220429-1ubuntu1 | w3m-img 0.5.3+git20220429-1ubuntu1 | Jan 16, 2026 |
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