Description
Null pointer dereference in the htmldoc v1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service via a crafted html file.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | htmldoc | v1.9.11 | — |
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 Pro 20.04 LTS | htmldoc | 1.9.7-1ubuntu0.3+esm1 | USN-7189-1 |
| Ubuntu Pro 18.04 LTS | htmldoc | 1.9.2-1ubuntu0.2+esm1 | USN-7189-1 |
| Ubuntu Pro 16.04 LTS | htmldoc | 1.8.27-8ubuntu1.1+esm2 | USN-7189-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | htmldoc | 1.8.27-8ubuntu1+esm3 | USN-7189-1 |
Advisories 3
- USN-7189-1 HTMLDOC vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 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