CVE-2022-42928

Severity: high (CVSS 8.8 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: none known
Published: 2022-12-22 · updated 2026-06-17
Weakness: CWE-476

Description

Certain types of allocations were missing annotations that, if the Garbage Collector was in a specific state, could have lead to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 106, Firefox ESR < 102.4, and Thunderbird < 102.4.

Affected products

Mozilla Firefox: before 106.0 — fixed in 106.0
Mozilla Firefox ESR: before 102.4 — fixed in 102.4
Mozilla Thunderbird: before 102.4 — fixed in 102.4

How to fix

Upgrade to a fixed version: Mozilla Firefox 106.0; Mozilla Firefox ESR 102.4; Mozilla Thunderbird 102.4. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1791520
https://www.mozilla.org/security/advisories/mfsa2022-44/
https://www.mozilla.org/security/advisories/mfsa2022-45/
https://www.mozilla.org/security/advisories/mfsa2022-46/
https://bugzilla.mozilla.org/show_bug.cgi?id=1791520
https://www.mozilla.org/security/advisories/mfsa2022-44/
https://www.mozilla.org/security/advisories/mfsa2022-45/
https://www.mozilla.org/security/advisories/mfsa2022-46/

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