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.
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Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-08-16. NVD baseline CVSS 7.8; sources differ by 0.0.
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.
August 15, 2022
November 4, 2025
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | w3m (0.5.3+git20220429-1ubuntu0.1) @ kinetic | 2026-05-25 | ubuntu |
| ubuntu | w3m (0.5.3-15ubuntu0.2+esm1) @ trusty | 2026-05-25 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
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ubuntu
CWE-787