CVE-2023-45922

GLX client crash via untrusted attribute count

Published Mar 27, 2024 · Updated Nov 4, 2025

Buffer over-read in Mesa 23.0.4 allows context-dependent attackers controlling an X server to crash a GLX client. In __glXGetDrawableAttribute(), glx_pbuffer.c trusts the reply's numAttribs field, allocates from a different length, and indexes data twice per claimed attribute. Exploitation requires a client to query a missing attribute through an attacker-controlled X server; the CVE is disputed because this availability requirement is uncommon.

CVSS severity4.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer over-read in Mesa 23.0.4 allows context-dependent attackers controlling an X server to crash a GLX client. In __glXGetDrawableAttribute(), glx_pbuffer.c trusts the reply's numAttribs field, allocates from a different length, and indexes data twice per claimed attribute. Exploitation requires a client to query a missing attribute through an attacker-controlled X server; the CVE is disputed because this availability requirement is uncommon.

The record

CVE
CVE-2023-45922
Published
Mar 27, 2024
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-754, T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.2SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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