CVE-2022-31747
CWE-125Published: December 22, 2022· Updated: Jun 17, 2026
Official Description
Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
Risk Analysis
Memory safety bugs in the browser engine could result in memory corruption, creating a path for arbitrary code execution. The critical CVSS score highlights the severe risk posed by this vulnerability to the underlying system.
There is no evidence of public exploitation or inclusion in the KEV list. The vulnerability is remotely exploitable.
Apply updates to Firefox 101, Firefox ESR 91.10, or Thunderbird 91.10 to remediate the flaw.
Technical Analysis
CVE-2022-31747 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (8)
Quick Facts
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-31747 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts