Is CVE-2024-4774 in the CISA KEV catalog?

No. CVE-2024-4774 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-4774?

CVE-2024-4774 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2024-4774?

CVE-2024-4774 has an EPSS score of 0.37% (29th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-4774?

Upgrade firefox on debian unstable to 126.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2024-4774

MEDIUM

6.5

CVSS v3

NVD

Description

The `ShmemCharMapHashEntry()` code was susceptible to potentially undefined behavior by bypassing the move semantics for one of its data members. This vulnerability affects Firefox < 126.

CWE-758

How to fix

Remediation Available

firefoxDebian

Fixed in:126.0-1CVE-2024-4774

firefoxUbuntu

Fixed in:126.0+build2-0ubuntu0.20.04.1USN-6779-1

DeveloperEditionWindows application

Affected:126.0Fixed in:126.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:126.0Fixed in:126.0Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.37%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Issue Tracking1

bugzilla.mozilla.org

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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 2025-03-28.