CVE-2024-4140: An excessive memory use issue (CWE-770) exists in Email-MIME, before version 1.954, which can cause denial of

Q: How do I fix CVE-2024-4140?

email-mime: upgrade to 1.954; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-4140 being exploited?

CVE-2024-4140 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-4140 affect?

CVE-2024-4140 affects email-mime, fedora. Severity is high (CVSS 7.5). An excessive memory use issue (CWE-770) exists in Email-MIME, before version 1.954, which can cause denial of service when parsing multipart MIME messages. The patch set (from 2020 and 2024) limits excessive depth and the total number of pa

Q: How urgent is CVE-2024-4140?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEMITIGATE

CVE-2024-4140 is a high-severity flaw (CVSS 7.5) affecting email-mime, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An excessive memory use issue (CWE-770) exists in Email-MIME, before version 1.954, which can cause denial of service when parsing multipart MIME messages. The patch set (from 2020 and 2024) limits excessive depth and the total number of parts.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-770
Published	2024-05-02
Last modified	2026-06-17

Publisher (CNA): Canonical Ltd. · Vendor: fedoraproject · rjbs

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

Am I affected?

Timeline

2024-05-02 20:15 UTCPublished CVE record published
2026-06-17 08:01 UTCUpdated Record last modified

rjbs email-mime UPGRADE

Affected: < 1.954

Fixed in: 1.954

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy email-mime || rpm -q email-mime || email-mime --version

2. UPGRADE to 1.954 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade email-mime

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade email-mime

Note

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

fedoraproject fedora MITIGATE

Affected: 39 · 40

Fixed in: no fixed release known

Safe to downgrade to: a release before 39

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-2024-4140?

email-mime: upgrade to 1.954; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-4140 being exploited?

CVE-2024-4140 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-2024-4140 affect?

CVE-2024-4140 affects email-mime, fedora. Severity is high (CVSS 7.5). An excessive memory use issue (CWE-770) exists in Email-MIME, before version 1.954, which can cause denial of service when parsing multipart MIME messages. The patch set (from 2020 and 2024) limits excessive depth and the total number of pa

How urgent is CVE-2024-4140?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

References

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