Buffer Overflow in WebGL glGetProgramiv

published 2023-09-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-54436

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

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.

Patch / fix

fixed in 4 distros 3

Mozilla Firefox 117
Mozilla Firefox ESR 115.2
Mozilla Thunderbird 115.2
mozilla firefox_esr 115.2

suse opensuse alpine

MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP5 +3 more 115.2.2-150200.8.130.1
MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.2.0-112.176.1
MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +10 more 115.2.0-150200.152.102.1
MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.2.0-150000.150.100.1

suse advisories SUSE-SU-2023:3664-1 SUSE-SU-2023:3562-1 SUSE-SU-2023:3559-1 SUSE-SU-2023:3519-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 117.0-1.1
MozillaThunderbird openSUSE Tumbleweed 115.2.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:13176-1 openSUSE-SU-2024:13202-1

firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 115.2.0-r0

alpine advisories ALPINE-CVE-2023-4582

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-4582 updated 2026-11-07 cvss 8.8

Mozilla: Buffer Overflow in WebGL glGetProgramiv

Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 firefox, thunderbird Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-19)

Exploit prediction

0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird
mozilla firefox_esr

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

mozilla.org /security/advisories/mfsa2023-34/
vendor-advisory
mozilla.org /security/advisories/mfsa2023-36/
vendor-advisory
mozilla.org /security/advisories/mfsa2023-38/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1773874
issue-tracking, permissions-required

Sources

CVE List CVE-2023-4582
NVD CVE-2023-4582

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary