Description
A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | htmldoc | Fixed in htmldoc v1.9.12 and above. | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | htmldoc | 1.9.11-4 | — |
| Debian 13 | htmldoc | 1.9.11-4 | — |
| Debian 12 | htmldoc | 1.9.11-4 | — |
| Debian 10 | htmldoc | 1.9.3-1+deb10u2 | DSA-4928-1 |
| Debian 9 | htmldoc | 1.8.27-8+deb9u1 | DLA-2700-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | htmldoc | 1.9.7-1ubuntu0.2 | USN-5198-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | htmldoc | No fix yet | — |
| Ubuntu Pro 14.04 LTS | htmldoc | No fix yet | — |
Advisories 3
- USN-5198-1 htmldoc vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4928-1 htmldoc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2700-1 htmldoc - security update Debian Security (DSA / DLA) · Mar 9, 2026