Vulnerability · Published Sep 9, 2022 · Assigned by mitre
CVE-2021-40648
Medium 5.5
In plain English
A medium-severity security flaw in the man2html package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 72.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | man2html | no fix listed | DEBIAN-CVE-2021-40648 |
| Debian:13 | man2html | no fix listed | DEBIAN-CVE-2021-40648 |
| Debian:14 | man2html | no fix listed | DEBIAN-CVE-2021-40648 |
| Ubuntu:22.04:LTS | man2html | no fix listed | UBUNTU-CVE-2021-40648 |
| Ubuntu:24.04:LTS | man2html | no fix listed | UBUNTU-CVE-2021-40648 |
| Ubuntu:25.10 | man2html | no fix listed | UBUNTU-CVE-2021-40648 |
| Ubuntu:26.04:LTS | man2html | no fix listed | UBUNTU-CVE-2021-40648 |
| Ubuntu:26.10 | man2html | no fix listed | UBUNTU-CVE-2021-40648 |
Affected products (as reported)
References
- https://gist.github.com/untaman/cb58123fe89fc65e3984165db5d40933 x_refsource_MISC