What’s Vulnerable › Vulnerabilities

CVE-2023-5168

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-27 · updated 2026-06-17
• Weakness: CWE-787

Description

A compromised content process could have provided malicious data to `FilterNodeD2D1` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

Affected products

• Mozilla Firefox: before 118 — fixed in 118
• Mozilla Firefox ESR: before 115.3 — fixed in 115.3
• Mozilla Thunderbird: before 115.3 — fixed in 115.3

How to fix

Upgrade to a fixed version: Mozilla Firefox 118; Mozilla Firefox ESR 115.3; Mozilla Thunderbird 115.3. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1846683
• https://www.mozilla.org/security/advisories/mfsa2023-41/
• https://www.mozilla.org/security/advisories/mfsa2023-42/
• https://www.mozilla.org/security/advisories/mfsa2023-43/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1846683
• https://www.mozilla.org/security/advisories/mfsa2023-41/
• https://www.mozilla.org/security/advisories/mfsa2023-42/
• https://www.mozilla.org/security/advisories/mfsa2023-43/

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