Guest-to-host corruption via reused array index
Published Jul 25, 2025 · Updated Aug 5, 2026
Array-index validation failure in Linux KVM 6.13 through 6.15.4 allows guest OS users to corrupt host interrupt state via EIOINTC writes. The LoongArch EIOINTC write handlers scale an index in place and then reuse it to read fixed-size enable and ISR arrays, accessing host memory beyond them. Exploitation requires code execution in a LoongArch guest using the in-kernel EIOINTC; resulting reads can corrupt interrupt routing and hang the host.
Summary
What happened
Array-index validation failure in Linux KVM 6.13 through 6.15.4 allows guest OS users to corrupt host interrupt state via EIOINTC writes. The LoongArch EIOINTC write handlers scale an index in place and then reuse it to read fixed-size enable and ISR arrays, accessing host memory beyond them. Exploitation requires code execution in a LoongArch guest using the in-kernel EIOINTC; resulting reads can corrupt interrupt routing and hang the host.
The record
- CVE
- CVE-2025-38367
- Published
- Jul 25, 2025
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-129, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 25, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=3956a52bc05bd811082a3c9d2b423ee957e6fefc <080e8d2ecdfde588897aa8a87a8884061f4dbbbb
- Affected versionversion=3956a52bc05bd811082a3c9d2b423ee957e6fefc <2cc84c4b0d70d42e291862ecc848890d18e1004a
- Affected versionversion=6.13
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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