What’s Vulnerable › Vulnerabilities

CVE-2021-40648

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-09-09 · updated 2026-06-17
• Weakness: CWE-20

Description

In man2html 1.6g, a filename can be created to overwrite the previous size parameter of the next chunk and the fd, bk, fd_nextsize, bk_nextsize of the current chunk. The next chunk is then freed later on, causing a freeing of an arbitrary amount of memory.

Affected products

• Man2Html Project Man2Html: 1.6g

References

• https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933
• https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933

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