CVE-2022-41220: md2roff 1.9 has a stack-based buffer overflow via a Markdown file, a different vulnerability than CVE-2022-349

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-41220 is a critical-severity flaw (CVSS 9.8) affecting md2roff. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

md2roff 1.9 has a stack-based buffer overflow via a Markdown file, a different vulnerability than CVE-2022-34913. NOTE: the vendor's position is that the product is not intended for untrusted input

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-09-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: md2roff project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-09-21 07:15 UTCPublished CVE record published
2026-06-17 05:02 UTCUpdated Record last modified

md2roff project md2roff DOWNGRADE

Affected: 1.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9

1. Check installed version

apt-cache policy md2roff || rpm -q md2roff || md2roff --version

2. No fixed release: DOWNGRADE to a release before 1.9 (Debian / Ubuntu)

apt-cache madison md2roff sudo apt install md2roff=<VERSION_BEFORE_1.9> sudo apt-mark hold md2roff

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list md2roff sudo dnf downgrade md2roff-<VERSION_BEFORE_1.9> sudo dnf versionlock add md2roff

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-41220?

md2roff: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-41220 being exploited?

CVE-2022-41220 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-41220 affect?

CVE-2022-41220 affects md2roff. Severity is critical (CVSS 9.8). md2roff 1.9 has a stack-based buffer overflow via a Markdown file, a different vulnerability than CVE-2022-34913. NOTE: the vendor's position is that the product is not intended for untrusted input

How urgent is CVE-2022-41220?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-34913 CRITICAL 9.8 DOWNGRADE md2roff 1.7 has a stack-based buffer overflow via a Markdown file containing a large number of consecutive cha

References

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