CVE-2023-4582: mozilla firefox Classic Buffer Overflow
Vulnerability summary
CVE-2023-4582 is a high (CVSS 8.8) Classic Buffer Overflow vulnerability in mozilla firefox. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.9% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 7 · Related 8Timeline
- 11-09-2023PublishedVulnerability first disclosed.
- 18-12-2025Last modifiedVulnerability information updated.
Description
Due to large allocation checks in Angle for glsl shaders being too lenient a buffer overflow could have occurred when allocating too much private shader memory on mac OS. *This bug only affects Firefox on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.89%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
0.00 pp
From 0.89% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Mozilla3 products
- firefox≥ unspecified, < 117 | < 117.0
- firefox_esr≥ unspecified, < 115.2 | < 115.2
- thunderbird≥ unspecified, < 115.2 | < 115.2
Chainguard1 product
- firefox-esr< 117.0-r0
2 vendors · 4 products
References
4 links- www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory