CVE-2022-1328: Buffer Overflow in uudecoder in Mutt affecting all versions starting from 0.94.13 before 2.2.3 allows read pas

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MEDIUM 4.3WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2022-1328 is a medium-severity flaw (CVSS 4.3) affecting mutt, debian linux, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer Overflow in uudecoder in Mutt affecting all versions starting from 0.94.13 before 2.2.3 allows read past end of input line

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-04-14
Last modified	2026-06-17

Publisher (CNA): GitLab Inc. · Vendor: debian · fedoraproject · mutt

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

Am I affected?

Timeline

2022-04-14 21:15 UTCPublished CVE record published
2026-06-17 04:22 UTCUpdated Record last modified

mutt mutt UPGRADE

Affected: >= 0.94.13 and < 2.2.3

Fixed in: 2.2.3

Safe to downgrade to: a release before 0.94.13

1. Check installed version

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

2. UPGRADE to 2.2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mutt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mutt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.94.13 (Debian / Ubuntu)

apt-cache madison mutt sudo apt install mutt=<VERSION_BEFORE_0.94.13> sudo apt-mark hold mutt

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mutt sudo dnf downgrade mutt-<VERSION_BEFORE_0.94.13> sudo dnf versionlock add mutt

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.

debian debian linux MITIGATE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 36

Fixed in: no fixed release known

Safe to downgrade to: a release before 36

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-1328?

mutt: upgrade to 2.2.3; debian linux: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-1328 being exploited?

CVE-2022-1328 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-2022-1328 affect?

CVE-2022-1328 affects mutt, debian linux, fedora. Severity is medium (CVSS 4.3). Buffer Overflow in uudecoder in Mutt affecting all versions starting from 0.94.13 before 2.2.3 allows read past end of input line

How urgent is CVE-2022-1328?

Priority 44/100. Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

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References

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