CVSS 3.1 Score 8.8 of 10 (high)


Published Dec 19, 2023
Updated: Feb 2, 2024
CWE ID 416


CVE-2023-6859 is a use-after-free vulnerability that affects Firefox ESR versions prior to 115.6, Thunderbird versions prior to 115.6, and Firefox versions prior to 121. The vulnerability occurs when TLS socket creation is under memory pressure. It has a base severity rating of HIGH with a base score of 8.8 according to NIST's National Vulnerability Database (NVD). The exploitability score is 2.8, and the impact score is 5.9. The vulnerability requires user interaction and can be exploited over a network without any privileges required. It poses a potential danger to organizations as it can lead to the compromise of confidentiality and integrity of affected systems. Remediation for this vulnerability involves updating to the latest versions of the affected software products.

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