What’s Vulnerable › Vulnerabilities

CVE-2022-34484

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-22 · updated 2026-06-17
• Weakness: CWE-416

Description

The Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Affected products

• Mozilla Firefox: before 102.0 — fixed in 102.0
• Mozilla Firefox ESR: before 91.11 — fixed in 91.11
• Mozilla Thunderbird: before 91.11 — fixed in 91.11

How to fix

Upgrade to a fixed version: Mozilla Firefox 102.0; Mozilla Firefox ESR 91.11; Mozilla Thunderbird 91.11. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1763634%2C1772651
• https://www.mozilla.org/security/advisories/mfsa2022-24/
• https://www.mozilla.org/security/advisories/mfsa2022-25/
• https://www.mozilla.org/security/advisories/mfsa2022-26/
• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1763634%2C1772651
• https://www.mozilla.org/security/advisories/mfsa2022-24/
• https://www.mozilla.org/security/advisories/mfsa2022-25/
• https://www.mozilla.org/security/advisories/mfsa2022-26/

Get alerted when CVE-2022-34484 or the next vulnerability affects your stack