FirefoxWeb browser · Mozilla
CVE-2024-6602
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 · uneditedA mismatch between allocator and deallocator could have led to memory corruption. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
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 confidenceA memory management vulnerability exists where memory allocated using one method is deallocated using a mismatched deallocator, leading to heap corruption. This type of allocator/deallocator mismatch can cause undefined behavior and potentially enable arbitrary code execution.
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
< 115.13< 128.0< 115.13>= 116.0, < 128.0CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.
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Check if Firefox is installedOn Windows, look for 'Mozilla Firefox' in Program Files or check Add/Remove Programs. On Linux, run 'which firefox' or 'dpkg -l | grep firefox'. On macOS, check /Applications for Firefox.app.Affected if Firefox is installed on the system
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Determine Firefox versionOpen Firefox, go to Menu > Help > About Firefox, or navigate to about:support in the address bar. Note the version number shown (e.g., 127.0.1, 115.12).Affected if Version is less than 115.13 or less than 128.0 (any version before 128.0 is affected)
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Check if Thunderbird is installedOn Windows, look for 'Mozilla Thunderbird' in Program Files or check Add/Remove Programs. On Linux, run 'which thunderbird' or 'dpkg -l | grep thunderbird'. On macOS, check /Applications for Thunderbird.app.Affected if Thunderbird is installed on the system
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Determine Thunderbird versionOpen Thunderbird, go to Menu > Help > About Thunderbird. Note the version number shown.Affected if Version is less than 115.13, or version is 116.0 or higher but less than 128.0
If Firefox version is below 128.0, or Thunderbird version is below 115.13 or is between 116.0 and 127.x, the environment is affected by CVE-2024-6602.
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 · scoped115.13128.0
Update affected Mozilla products to the patched versions: Firefox 128, Firefox ESR 115.13, or Thunderbird 115.13/128 as appropriate.
Firefox 128.0 / Firefox ESR 115.13 / Thunderbird 128.0 / Thunderbird ESR 115.13
- Upgrade Firefox to version 128.0 or later
- Upgrade Firefox ESR to version 115.13 or later
- Upgrade Thunderbird to version 128.0 or later
- Upgrade Thunderbird ESR to version 115.13 or later
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Firefox
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-6602 — 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-2024-6602 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
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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