CVE-2023-29531Public exploitNetwork attack vector

Memory corruption via unset WebGL point size

Published Jun 19, 2023 · Updated Dec 11, 2024

Out-of-bounds write in Firefox before 112, Firefox ESR before 102.10, and Thunderbird before 102.10 allows remote attackers to crash macOS clients. The browser passes POINTS draws from shaders that omit gl_PointSize into a macOS OpenGL driver path that is not robust when the value is unset. A crafted WebGL workload reaches that path without authentication; the documented result is a browser crash, while code execution was not demonstrated.

CVSS severity9.8
Critical
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Firefox before 112, Firefox ESR before 102.10, and Thunderbird before 102.10 allows remote attackers to crash macOS clients. The browser passes POINTS draws from shaders that omit gl_PointSize into a macOS OpenGL driver path that is not robust when the value is unset. A crafted WebGL workload reaches that path without authentication; the documented result is a browser crash, while code execution was not demonstrated.

The record

CVE
CVE-2023-29531
Published
Jun 19, 2023
Updated
Dec 11, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <112

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <112
Mozilla · Thunderbirdversion=unspecified <102.10
Mozilla · Firefox ESRversion=unspecified <102.10

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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