CVE-2023-23759

7.5 highEPSS 0.7%

High (7.5) in facebook fizz. EPSS 0.7% chance of exploitation in the next 30 days.

There is a vulnerability in the fizz library prior to v2023.01.30.00 where a CHECK failure can be triggered remotely. This behavior requires the client supported cipher advertisement changing between the original ClientHello and the second ClientHello, crashing the process (impact is limited to denial of service).

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE: CWE-617
Published: 2023-05-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

facebook:fizz

References

https://github.com/facebookincubator/fizz/commit/8d3649841597bedfb6986c30431ebad0eb215265
https://www.facebook.com/security/advisories/cve-2023-23759
https://github.com/facebookincubator/fizz/commit/8d3649841597bedfb6986c30431ebad0eb215265
https://www.facebook.com/security/advisories/cve-2023-23759

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