CVE-2022-42930

Unspecified impact via concurrent CacheStorage initialization

Published Dec 22, 2022 · Updated Apr 15, 2025

Race condition in Firefox before 106 allows attackers to cause unspecified impact via concurrent CacheStorage initialization. The XPCOMService_GetThirdPartyUtil getter initializes a deprecated, inherently non-thread-safe service from simultaneous Worker threads. Accessing the caches global in two Workers is required; Mozilla found the race difficult to reproduce and did not disclose a concrete consequence.

CVSS severity7.1
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Firefox before 106 allows attackers to cause unspecified impact via concurrent CacheStorage initialization. The XPCOMService_GetThirdPartyUtil getter initializes a deprecated, inherently non-thread-safe service from simultaneous Worker threads. Accessing the caches global in two Workers is required; Mozilla found the race difficult to reproduce and did not disclose a concrete consequence.

The record

CVE
CVE-2022-42930
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-362
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <106

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Mozilla · Firefoxversion=unspecified <106

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
7.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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