CVE-2024-5688

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-06-11 · updated 2026-06-17
Weakness: CWE-416

Description

If a garbage collection was triggered at the right time, a use-after-free could have occurred during object transplant. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

Affected products

Mozilla Firefox: before 115.12; before 127.0 — fixed in 115.12, 127.0
Mozilla Thunderbird: before 115.12 — fixed in 115.12

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.12, 127.0; Mozilla Thunderbird 115.12. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1895086
https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html
https://www.mozilla.org/security/advisories/mfsa2024-25/
https://www.mozilla.org/security/advisories/mfsa2024-26/
https://www.mozilla.org/security/advisories/mfsa2024-28/
https://bugzilla.mozilla.org/show_bug.cgi?id=1895086
https://lists.debian.org/debian-lts-announce/2024/06/msg00000.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00010.html
https://www.mozilla.org/security/advisories/mfsa2024-25/
https://www.mozilla.org/security/advisories/mfsa2024-26/
https://www.mozilla.org/security/advisories/mfsa2024-28/

Get alerted when CVE-2024-5688 or the next vulnerability affects your stack