What’s Vulnerable › Vulnerabilities

CVE-2021-40985

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-03 · updated 2026-06-17
• Weakness: CWE-125

Description

A stack-based buffer under-read in htmldoc before 1.9.12, allows attackers to cause a denial of service via a crafted BMP image to image_load_bmp.

Affected products

• Debian Linux: 9.0
• htmldoc: before 1.9.12 — fixed in 1.9.12

How to fix

Upgrade to a fixed version: htmldoc 1.9.12. Check the vendor advisory for mitigations.

References

• https://github.com/michaelrsweet/htmldoc/commit/f12b9666e582a8e7b70f11b28e5ffc49ad625d43
• https://github.com/michaelrsweet/htmldoc/issues/444
• https://lists.debian.org/debian-lts-announce/2022/02/msg00022.html
• https://github.com/michaelrsweet/htmldoc/commit/f12b9666e582a8e7b70f11b28e5ffc49ad625d43
• https://github.com/michaelrsweet/htmldoc/issues/444
• https://lists.debian.org/debian-lts-announce/2022/02/msg00022.html

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