Advisory Published
CVE Published


First published: Tue Nov 21 2023(Updated: )

Memory safety bugs present in Firefox 119. 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 < 120.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox<120
Mozilla Firefox<120.0

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for the memory safety bugs in Firefox?

    The vulnerability ID for the memory safety bugs in Firefox is CVE-2023-6213.

  • What is the severity level of CVE-2023-6213?

    CVE-2023-6213 has a severity level of high.

  • What does CVE-2023-6213 affect?

    CVE-2023-6213 affects Firefox versions prior to 120.

  • What is the potential impact of CVE-2023-6213?

    CVE-2023-6213 could allow an attacker to run arbitrary code.

  • Where can I find more information about CVE-2023-6213?

    You can find more information about CVE-2023-6213 in the following references: [link 1](https://bugzilla.mozilla.org/buglist.cgi?bug_id=1849265%2C1851118%2C1854911), [link 2](https://www.mozilla.org/security/advisories/mfsa2023-49/), [link 3](https://www.mozilla.org/en-US/security/advisories/mfsa2023-49/).


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