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TI-2026-29161 Aliases CVE-2026-40393GHSA-w54f-pw7x-c532

Out-of-bounds write in mesa3d Mesa

Priority MEDIUM 43CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00427 37th percentileScored 2026-11-07
Fix Fixed Mesa (mesa3d): 25.3.6, 26.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
mesa3dMesabefore 25.3.6; 26.0.0 to before 26.0.125.3.6, 26.0.1Patch availableCNA
  • Mesa Vendormesa3d Affected before 25.3.6; 26.0.0 to before 26.0.1 Fixed in 25.3.6, 26.0.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mesa3d:mesa:*:*:*:*:*:*:*:*before 25.3.6Vulnerablemesa3d
cpe:2.3:a:mesa3d:mesa:26.0.0:*:*:*:*:*:*:*26.0.0Vulnerablemesa3d
  • cpe:2.3:a:mesa3d:mesa:*:*:*:*:*:*:*:* Versions before 25.3.6 Vulnerable ·mesa3d
  • cpe:2.3:a:mesa3d:mesa:26.0.0:*:*:*:*:*:*:* Versions 26.0.0 Vulnerable ·mesa3d

Remediation

  • Fix · CNA Mesa (mesa3d) Fixed in 25.3.6, 26.0.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40393
  2. 2026-10-03 Alias added: GHSA-w54f-pw7x-c532

References

Other 2

  • TI-2023-24659 Mesa 23.0.4 was discovered to contain a buffer over-read in glXQueryServerString(). CVSS 3.1MEDIUM 5.3
  • TI-2023-24666 Mesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the… CVSS 3.1HIGH 7.5
  • TI-2013-01765 Multiple integer overflows in X.org libGLX in Mesa 9.1.1 and earlier allow X servers to… CVSS 2.0MEDIUM 6.8
  • TI-2013-01654 The Intel drivers in Mesa 8.0.x and 9.0.x allow context-dependent attackers to cause a… CVSS 2.0MEDIUM 6.8
  • TI-2023-24658 Mesa v23.0.4 was discovered to contain a NULL pointer dereference via the function… CVSS 3.1MEDIUM 6.2
  • TI-2023-24661 glx_pbuffer.c in Mesa 23.0.4 was discovered to contain a segmentation violation when… CVSS 3.1MEDIUM 4.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences