What’s Vulnerable › Vulnerabilities

CVE-2024-3864

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-04-16 · updated 2026-06-17
• Weakness: CWE-119

Description

Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Affected products

• Debian Linux: 10.0
• Mozilla Firefox: before 115.10.0; before 125.0 — fixed in 115.10.0, 125.0
• Mozilla Thunderbird: before 115.10.0 — fixed in 115.10.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.10.0, 125.0; Mozilla Thunderbird 115.10.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1888333
• https://lists.debian.org/debian-lts-announce/2024/04/msg00012.html
• https://lists.debian.org/debian-lts-announce/2024/04/msg00013.html
• https://www.mozilla.org/security/advisories/mfsa2024-18/
• https://www.mozilla.org/security/advisories/mfsa2024-19/
• https://www.mozilla.org/security/advisories/mfsa2024-20/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1888333
• https://lists.debian.org/debian-lts-announce/2024/04/msg00012.html
• https://lists.debian.org/debian-lts-announce/2024/04/msg00013.html
• https://www.mozilla.org/security/advisories/mfsa2024-18/
• https://www.mozilla.org/security/advisories/mfsa2024-19/
• https://www.mozilla.org/security/advisories/mfsa2024-20/

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