Description
A stack-based buffer overflow in image_load_bmp() in HTMLDOC <= 1.9.13 results in remote code execution if the victim converts an HTML document linking to a crafted BMP file.
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 | 1.9.13-1 | — |
| Debian 13 | htmldoc | 1.9.13-1 | — |
| Debian 12 | htmldoc | 1.9.13-1 | — |
| Debian 9 | htmldoc | 1.8.27-8+deb9u2 | DLA-2928-1 |
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 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Subscription Management Tool 11 SP3 | htmldoc | 1.8.27-170.4.6.1 | SUSE-SU-2022:14877-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | htmldoc | 1.9.14-1.1 | openSUSE-SU-2024:11741-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- HTMLDOC 1.9.13 - Stack Buffer Overflow EDB-52425 · remote · Sep 16, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 4
- USN-7189-1 HTMLDOC vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DLA-2928-1 htmldoc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11741-1 htmldoc-1.9.14-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:14877-1 Security update for htmldoc SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/michaelrsweet/htmldoc/issues/453
- https://github.com/michaelrsweet/htmldoc/commit/27d08989a5a567155d506ac870ae7d8cc88fa58b
- https://github.com/michaelrsweet/htmldoc/compare/v1.9.12...v1.9.13
- https://github.com/michaelrsweet/htmldoc/issues/456
- [debian-lts-announce] 20220226 [SECURITY] [DLA 2928-1] htmldoc security update mailing-list