CVE-2023-4874

Q: How do I fix CVE-2023-4874?

Published advisories record a fix for 12 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2023-4874 being actively exploited?

Not that we know of. CVE-2023-4874 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.84% is the estimated probability that it will be exploited in the next 30 days. That is higher than 56% of all scored CVEs.

Q: How severe is CVE-2023-4874?

CVE-2023-4874 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2023-4874 affect?

Published advisories record a fix for mutt (Amazon), mutt-debuginfo (Amazon), mutt-debugsource (Amazon), mutt (Debian), and 8 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

4.3

CVSS v3

NVD

Description

Null pointer dereference when viewing a specially crafted email in Mutt >1.5.2 <2.2.12

CWE-475 CWE-476NULL Pointer Dereference

How to fix

Remediation Available

muttAmazon

Fixed in:5:1.5.21-29.amzn2.0.2

Fixed in:5:2.2.9-1.amzn2023.0.2

mutt-debuginfoAmazon

Fixed in:5:1.5.21-29.amzn2.0.2

Fixed in:5:2.2.9-1.amzn2023.0.2

mutt-debugsourceAmazon

Fixed in:5:2.2.9-1.amzn2023.0.2

muttDebian

Fixed in:2.2.9-1+deb12u1CVE-2023-4874

Fixed in:2.2.12-0.1CVE-2023-4874

muttRed Hat / RHEL

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

muttRocky

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

mutt-debuginfoRocky

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

mutt-debuginfoRed Hat / RHEL

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

mutt-debugsourceRocky

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

mutt-debugsourceRed Hat / RHEL

Fixed in:5:2.0.7-3.el8RHSA-2024:3058

Fixed in:5:2.2.6-2.el9RHSA-2024:2290

muttUbuntu

Fixed in:1.5.24-1ubuntu0.6+esm3USN-6374-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:1.9.4-3ubuntu0.6+esm1USN-6374-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1.13.2-1ubuntu0.6USN-6374-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:2.1.4-1ubuntu1.2USN-6374-1

Fixed in:2.2.9-1ubuntu0.23.04.1USN-6374-1

This Ubuntu release reached end-of-life on 2024-01-20.

Fixed in:2.2.9-1ubuntu0.23.10.1USN-6374-2

This Ubuntu release reached end-of-life on 2024-07-12.

mutt-patchedUbuntu

Fixed in:1.5.24-1ubuntu0.6+esm3USN-6374-1

This Ubuntu release reached end-of-life on 2021-04-02.

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploit Intelligence

0.84%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Vendor Advisory2

Other references3

Related Vulnerabilities

Other CWE-475 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-7925	High	7.5	1.7%	-	Fix
CVE-2025-47865	High	7.5	1.7%	-	-
CVE-2026-42009	Medium	7.5	1.3%	-	Fix
CVE-2024-20380	High	7.5	1.1%	-	-
CVE-2023-2253	Medium	6.5	0.9%	-	Fix
CVE-2024-10569	High	7.5	0.6%	-	-

Common questions

How do I fix CVE-2023-4874?

Published advisories record a fix for 12 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-4874 being actively exploited?

Not that we know of. CVE-2023-4874 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.84% is the estimated probability that it will be exploited in the next 30 days. That is higher than 56% of all scored CVEs.

How severe is CVE-2023-4874?

CVE-2023-4874 has a CVSS v3 base score of 4.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-4874 affect?

Published advisories record a fix for mutt (Amazon), mutt-debuginfo (Amazon), mutt-debugsource (Amazon), mutt (Debian), and 8 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.