What’s Vulnerable › Vulnerabilities

CVE-2021-23165

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-03-16 · updated 2026-06-17
• Weakness: CWE-122

Description

A flaw was found in htmldoc before v1.9.12. Heap buffer overflow in pspdf_prepare_outpages(), in ps-pdf.cxx may lead to execute arbitrary code and denial of service.

Affected products

• 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://bugzilla.redhat.com/show_bug.cgi?id=1967014
• https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f
• https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f.patch
• https://github.com/michaelrsweet/htmldoc/issues/413
• https://bugzilla.redhat.com/show_bug.cgi?id=1967014
• https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f
• https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f.patch
• https://github.com/michaelrsweet/htmldoc/issues/413

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