CVE-2023-45931: Mesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the has_error state

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-45931 is a high-severity flaw (CVSS 7.5) affecting mesa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the has_error state. NOTE: this is disputed because there is no scenario in which the vulnerability was demonstrated.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-476
Published	2024-03-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mesa3d

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-03-27 04:15 UTCPublished CVE record published
2026-06-17 06:29 UTCUpdated Record last modified

mesa3d mesa DOWNGRADE

Affected: 23.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 23.0.4

1. Check installed version

apt-cache policy mesa || rpm -q mesa || mesa --version

2. No fixed release: DOWNGRADE to a release before 23.0.4 (Debian / Ubuntu)

apt-cache madison mesa sudo apt install mesa=<VERSION_BEFORE_23.0.4> sudo apt-mark hold mesa

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mesa sudo dnf downgrade mesa-<VERSION_BEFORE_23.0.4> sudo dnf versionlock add mesa

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-45931?

mesa: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-45931 being exploited?

CVE-2023-45931 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-45931 affect?

CVE-2023-45931 affects mesa. Severity is high (CVSS 7.5). Mesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the has_error state. NOTE: this is disputed because there is no scenario in which the vulnerability was demonstrated.

How urgent is CVE-2023-45931?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-40393 HIGH 8.1 UPGRADE In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount
CVE-2026-29075 HIGH 8.3 UPGRADE Mesa is an open-source Python library for agent-based modeling, simulating complex systems and exploring emerg
CVE-2023-45922 MEDIUM 4.3 DOWNGRADE glx_pbuffer.c in Mesa 23.0.4 was discovered to contain a segmentation violation when calling __glXGetDrawableA
CVE-2023-45919 MEDIUM 5.3 DOWNGRADE Mesa 23.0.4 was discovered to contain a buffer over-read in glXQueryServerString()
CVE-2023-45913 MEDIUM 6.2 DOWNGRADE Mesa v23.0.4 was discovered to contain a NULL pointer dereference via the function dri2GetGlxDrawableFromXDraw

References

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