What’s Vulnerable › Vulnerabilities

CVE-2018-18503

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-02-05 · updated 2026-06-17
• Weakness: CWE-119

Description

When JavaScript is used to create and manipulate an audio buffer, a potentially exploitable crash may occur because of a compartment mismatch in some situations. This vulnerability affects Firefox < 65.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
• Mozilla Firefox: before 65.0 — fixed in 65.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 65.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/106773
• https://usn.ubuntu.com/3874-1/
• https://www.mozilla.org/security/advisories/mfsa2019-01/
• http://www.securityfocus.com/bid/106773
• https://usn.ubuntu.com/3874-1/
• https://www.mozilla.org/security/advisories/mfsa2019-01/

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