FirefoxWeb browser · Mozilla
CVE-2018-18504
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 crash and out-of-bounds read can occur when the buffer of a texture client is freed while it is still in use during graphic operations. This results is a potentially exploitable crash and the possibility of reading from the memory of the freed buffers. This vulnerability affects Firefox < 65.
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 use-after-free vulnerability in Firefox's graphics subsystem where a texture client buffer is freed while still in use during graphic operations, allowing out-of-bounds reads from freed memory and potentially exploitable crashes.
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
< 65.0
Ubuntu LinuxOperating system
= 14.04= 16.04= 18.04= 18.10CVSS 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:3.0/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.
-
Check if Firefox is installedRun command: which firefox or dpkg -l | grep firefox (Debian/Ubuntu) or rpm -qa | grep firefox (RHEL/CentOS)Affected if Firefox is not installed on the system
-
Determine installed Firefox versionRun: firefox --version or check package: dpkg -l firefox (Ubuntu/Debian)Affected if Unable to determine version or version is not displayed
-
Compare version against affected rangeIf version is obtained, check if it is less than 65.0 (for example, 64.x, 64.0.x, etc.)Affected if Firefox version is below 65.0 (such as 64.3, 64.0.1, 63.0, etc.)
-
Verify OS version on Ubuntu systemsRun: lsb_release -a or check /etc/lsb-releaseAffected if Running Ubuntu 14.04, 16.04, 18.04, or 18.10 with Firefox installed and version below 65.0
The environment is affected if Firefox is installed and its version is below 65.0, regardless of the underlying operating system.
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 · scoped65.0
Update Firefox to version 65 or later to patch this vulnerability.
Firefox 65.0
- Back up Firefox profile (bookmarks, passwords, settings) to preserve user data
- Download Firefox 65.0 or later from the official Mozilla website (www.mozilla.org)
- Close all Firefox instances
- Install the new Firefox version overwriting the existing installation
- Restart Firefox and verify the new version by navigating to about:support
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Firefox
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,512.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-18504 — 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-2018-18504 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