CVE-2024-39499: vmci: prevent speculation leaks by sanitizing event in event_deliver()

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-12 · updated 2026-06-17
Weakness: CWE-668

Description

In the Linux kernel, the following vulnerability has been resolved: vmci: prevent speculation leaks by sanitizing event in event_deliver() Coverity spotted that event_msg is controlled by user-space, event_msg->event_data.event is passed to event_deliver() and used as an index without sanitization. This change ensures that the event index is sanitized to mitigate any possibility of speculative information leaks. This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc. Only compile tested, no access to HW.

Affected products

Linux kernel: from 3.9 before 4.19.317; from 4.20 before 5.4.279; from 5.5 before 5.10.221; from 5.11 before 5.15.162; from 5.16 before 6.1.95; from 6.2 before 6.6.35 — fixed in 4.19.317, 5.10.221, 5.15.162, 5.4.279, 6.1.95, 6.6.35

How to fix

Upgrade to a fixed version: Linux kernel 4.19.317, 5.10.221, 5.15.162, 5.4.279. Check the vendor advisory for mitigations.

References

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