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Description

Time-of-check time-of-use (toctou) race condition in Windows Virtual Machine Bus allows an unauthorized attacker to execute code locally.

PUBLISHED Reserved 2025-03-11 | Published 2025-05-13 | Updated 2026-02-26 | Assigner microsoft




HIGH: 7.7CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Product status

10.0.10240.0 (custom) before 10.0.10240.21014
affected

10.0.14393.0 (custom) before 10.0.14393.8066
affected

10.0.17763.0 (custom) before 10.0.17763.7314
affected

10.0.19044.0 (custom) before 10.0.19044.5854
affected

10.0.19045.0 (custom) before 10.0.19045.5854
affected

10.0.22621.0 (custom) before 10.0.22621.5335
affected

10.0.22631.0 (custom) before 10.0.22631.5335
affected

10.0.22631.0 (custom) before 10.0.22631.5335
affected

10.0.26100.0 (custom) before 10.0.26100.4061
affected

6.2.9200.0 (custom) before 6.2.9200.25475
affected

6.2.9200.0 (custom) before 6.2.9200.25475
affected

6.3.9600.0 (custom) before 6.3.9600.22577
affected

6.3.9600.0 (custom) before 6.3.9600.22577
affected

10.0.14393.0 (custom) before 10.0.14393.8066
affected

10.0.14393.0 (custom) before 10.0.14393.8066
affected

10.0.17763.0 (custom) before 10.0.17763.7314
affected

10.0.17763.0 (custom) before 10.0.17763.7314
affected

10.0.20348.0 (custom) before 10.0.20348.3692
affected

10.0.25398.0 (custom) before 10.0.25398.1611
affected

10.0.26100.0 (custom) before 10.0.26100.4061
affected

10.0.26100.0 (custom) before 10.0.26100.4061
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29833 (Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2025-29833)

nvd.nist.gov (CVE-2025-29833)

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