What’s Vulnerable › Vulnerabilities

CVE-2023-4582: Buffer Overflow in WebGL glGetProgramiv

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-11 · updated 2026-06-17
• Weakness: CWE-120

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.

Affected products

• Mozilla Firefox: before 117.0 — fixed in 117.0
• Mozilla Firefox ESR: before 115.2 — fixed in 115.2
• Mozilla Thunderbird: before 115.2 — fixed in 115.2

How to fix

Upgrade to a fixed version: Mozilla Firefox 117.0; Mozilla Firefox ESR 115.2; Mozilla Thunderbird 115.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1773874
• https://www.mozilla.org/security/advisories/mfsa2023-34/
• https://www.mozilla.org/security/advisories/mfsa2023-36/
• https://www.mozilla.org/security/advisories/mfsa2023-38/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1773874
• https://www.mozilla.org/security/advisories/mfsa2023-34/
• https://www.mozilla.org/security/advisories/mfsa2023-36/
• https://www.mozilla.org/security/advisories/mfsa2023-38/

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