What is CVE-2023-5724?

CVE-2023-5724 is a high-severity vulnerability in Mozilla Firefox, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-10-25.

How severe is CVE-2023-5724?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-5724 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Mozilla Firefox

CVE-2023-5724

Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Vulnerability class: DoS (Denial of Service)

Published 2023-10-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Mozilla Firefox — versions unspecified
Mozilla Firefox Esr — versions unspecified
Mozilla Firefox Esr
Mozilla Thunderbird — versions unspecified
Debian Linux — versions 10.0, 11.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

References

bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
www.mozilla.org/security/advisories/mfsa2023-45/ (Vendor Advisory)
www.mozilla.org/security/advisories/mfsa2023-46/ (Vendor Advisory)
www.mozilla.org/security/advisories/mfsa2023-47/ (Vendor Advisory)
www.debian.org/security/2023/dsa-5535 (Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/10/msg00037.html (Mailing List, Third Party Advisory)
www.debian.org/security/2023/dsa-5538 (Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/10/msg00042.html (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-5724?: CVE-2023-5724 is a high-severity vulnerability in Mozilla Firefox, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-10-25.
How severe is CVE-2023-5724?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-5724 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.