What is CVE-2023-5172?

CVE-2023-5172 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2023-09-27.

How severe is CVE-2023-5172?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Mozilla Firefox

CVE-2023-5172

A hashtable in the Ion Engine could have been mutated while there was a live interior reference, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 118.

Vulnerability class: Use-After-Free

EPSS: 0.008 (53.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-416 — Use After Free

References

security@mozilla.org (Permissions Required)
security@mozilla.org (Vendor Advisory)
security@mozilla.org

Frequently asked questions

What is CVE-2023-5172?: CVE-2023-5172 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2023-09-27.
How severe is CVE-2023-5172?: Critical severity. CVSS v3 base score is 9.8 out of 10.