CVE-2024-4774
MEDIUMDescription
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.
How to fix
This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.
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
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Exploit Intelligence
Low risk: more likely to be exploited than 31% of all known CVEs.
References
Related Vulnerabilities
Other CWE-758 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2026-22858 | Critical | 9.1 | 0.7% | - | Fix |
| CVE-2023-30624 | Low | 3.9 | 0.4% | - | Fix |
| CVE-2026-4705 | Critical | 9.8 | 0.4% | - | Fix |
| CVE-2026-24407 | High | 7.1 | 0.4% | - | Fix |
| CVE-2026-24404 | High | 7.1 | 0.4% | - | Fix |
| CVE-2025-55160 | Medium | 6.1 | 0.4% | - | Fix |
Common questions
How do I fix CVE-2024-4774?
Published advisories record a fix for 4 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-2024-4774 being actively exploited?
Not that we know of. CVE-2024-4774 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.37% is the estimated probability that it will be exploited in the next 30 days. That is higher than 31% of all scored CVEs.
How severe is CVE-2024-4774?
CVE-2024-4774 has a CVSS v3 base score of 6.5, 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-2024-4774 affect?
Published advisories record a fix for firefox (Debian), firefox (Ubuntu), Firefox Developer Edition (en-US) (Windows application), Mozilla Firefox (en-US) (Windows application). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2024-4774
Markdown
[](https://tridentstack.com/cve/CVE-2024-4774)HTML
<a href="https://tridentstack.com/cve/CVE-2024-4774"><img src="https://tridentstack.com/cve/badge/CVE-2024-4774.svg" alt="CVE-2024-4774"></a>Check your Linux endpoints for this class of vulnerability
TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.
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.