Is CVE-2023-4582 in the CISA KEV catalog?

No. CVE-2023-4582 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-4582?

CVE-2023-4582 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2023-4582?

CVE-2023-4582 has an EPSS score of 0.76% (51th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-4582?

Upgrade DeveloperEdition to 117.0 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2023-4582

HIGH

8.8

CVSS v3

NVD

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.

CWE-120Classic Buffer Overflow

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:117.0Fixed in:117.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:117.0Fixed in:117.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:115.2Fixed in:115.2Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:115.2Fixed in:115.2Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.76%probability of exploitation in 30 days

51stpercentile

Moderate risk: more likely to be exploited than 51% of all known CVEs.

References

Vendor Advisory3

Issue Tracking1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-18.