CVE-2024-3302

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-16 · updated 2026-06-17
Weakness: CWE-770

Description

There was no limit to the number of HTTP/2 CONTINUATION frames that would be processed. A server could abuse this to create an Out of Memory condition in the browser. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Affected products

Mozilla Firefox: before 115.10; before 125.0 — fixed in 115.10, 125.0
Mozilla Thunderbird: through 115.10

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.10, 125.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1881183
https://kb.cert.org/vuls/id/421644
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=1881183
https://kb.cert.org/vuls/id/421644
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/

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