FirefoxWeb browser · Mozilla
CVE-2022-46879
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 · uneditedMozilla developers and community members Lukas Bernhard, Gabriele Svelto, Randell Jesup, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 107. 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 < 108.
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 · moderate confidenceMemory safety bugs in Firefox 107 allowing memory corruption and potential arbitrary code execution. Multiple memory safety issues (likely use-after-free or similar memory corruption flaws) that could be exploited with sufficient effort.
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
< 108.0CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 checksWork through these to decide whether this CVE applies to you.
-
Check Firefox version on WindowsOpen Firefox, click the menu button (three horizontal lines), select Help, then select About Firefox. The version number will be displayed in the window that opens.Affected if The displayed version is below 108.0 (e.g., 107.x or earlier)
-
Check Firefox version on macOSOpen Firefox, click Firefox in the menu bar, then select About Firefox. The version number will be shown in the dialog that appears.Affected if The displayed version is below 108.0 (e.g., 107.x or earlier)
-
Check Firefox version on LinuxRun the command 'firefox --version' in a terminal, or open Firefox and navigate to 'Help > About Firefox'.Affected if The displayed version is below 108.0 (e.g., 107.x or earlier)
-
Check Firefox version via package managerIf installed via a package manager, run 'rpm -q firefox' (RHEL/Fedora) or 'dpkg -l firefox' (Debian/Ubuntu) to query the installed package version.Affected if The queried version is below 108.0
If the installed Firefox version is less than 108.0, the environment is affected by this CVE.
Generated from the published advisory. Verify against your own configuration.
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 · scoped108.0
Update Firefox to version 108 or later to patch the memory safety vulnerabilities.
Firefox 108.0 or later
- 1. Open Firefox browser
- 2. Click the menu button (three horizontal lines) in the top right corner
- 3. Select 'Help' from the dropdown menu
- 4. Click 'About Firefox'
- 5. The browser will check for updates and download Firefox 108.0 or later automatically
- 6. Once the download completes, click 'Restart to update Firefox' to apply the upgrade
- 7. After Firefox restarts, verify the version by going to Help > About Firefox - it should show 108.0 or higher
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Firefox
Scoped from the published advisory
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-46879 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-46879 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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