dbcve.org
FirefoxWeb browser · Mozilla

CVE-2022-45405

MEDIUM · 6.5 CVSS v3.1 Published 2022-12-22
Fix available
A fix is available. Upgrade to 102.5 / 107.0 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Freeing arbitrary <code>nsIInputStream</code>'s on a different thread than creation could have led to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A thread safety vulnerability in Firefox and Thunderbird where nsIInputStream objects are freed on a different thread than they were created, leading to a use-after-free condition that could be exploited for crashes or code execution.

MitigationUpdate affected products to patched versions: Firefox ESR 102.5+, Thunderbird 102.5+, or Firefox 107+.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FirefoxWeb browser
Affected:< 107.0
Firefox EsrWeb browser
Affected:< 102.5
ThunderbirdApplication
Affected:< 102.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed Mozilla product
    Check if Firefox or Thunderbird is installed on the system. On Windows, look in Program Files or Program Files (x86). On macOS, check /Applications. On Linux, check package manager or common paths like /usr/lib/firefox or /usr/lib/thunderbird.
    Affected if Neither Firefox nor Thunderbird is installed (not affected)
  2. Determine Firefox version
    For Firefox, type 'about:support' in the address bar and look at the 'Version' field, or run 'firefox --version' from command line.
    Affected if Version is less than 107.0 (107.0 and above are patched)
  3. Determine Firefox ESR version
    For Firefox ESR, type 'about:support' in the address bar and look at the 'Version' field. ESR versions typically end with an 'esr' suffix (e.g., 102.4esr).
    Affected if Version is less than 102.5 (102.5 and above are patched)
  4. Determine Thunderbird version
    For Thunderbird, type 'about:support' in the address bar and look at the 'Version' field, or run 'thunderbird --version' from command line.
    Affected if Version is less than 102.5 (102.5 and above are patched)

User is affected if Firefox (any channel) below 107.0, Firefox ESR below 102.5, or Thunderbird below 102.5 is installed and actively used.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 102.5 / 107.0 or later
Fixed in 102.5107.0
Interim mitigation

Update affected products to patched versions: Firefox ESR 102.5+, Thunderbird 102.5+, or Firefox 107+.

Recommended fix High confidence

Firefox 107.0, Firefox ESR 102.5, or Thunderbird 102.5 (depending on product)

  1. Identify the currently installed Mozilla product (Firefox, Firefox ESR, or Thunderbird) and its exact version
  2. For Windows: Open the application, go to Help > About Firefox/Thunderbird to check the version
  3. For macOS: Open the application, go to Firefox/Thunderbird > About to check the version
  4. For Linux: Run 'firefox --version' or 'thunderbird --version' in terminal
  5. Download the appropriate fixed version from the official Mozilla website: https://www.mozilla.org/
  6. For Firefox users: Upgrade to version 107.0 or later
  7. For Firefox ESR users: Upgrade to version 102.5 or later
  8. For Thunderbird users: Upgrade to version 102.5 or later
Caveat Standard minor version upgrades typically preserve user settings and data; ensure you close the application completely before installing

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Firefox Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,980
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,168.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-45405 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data