Host denial of service via PCM_INFO integer overflow
Published Jun 19, 2026 · Updated Jun 19, 2026
Integer overflow in QEMU 8.2.0 through 10.2.1 allows guest OS users to exhaust host memory via crafted virtio-snd PCM_INFO requests. virtio_snd_handle_pcm_info multiplies guest-controlled count and size values and adds a header size without checking for unsigned overflow before comparing the required response size. A guest must have access to the emulated virtio-snd device; successful exploitation consumes unbounded host memory and can interrupt the host service.
Summary
What happened
Integer overflow in QEMU 8.2.0 through 10.2.1 allows guest OS users to exhaust host memory via crafted virtio-snd PCM_INFO requests. virtio_snd_handle_pcm_info multiplies guest-controlled count and size values and adds a header size without checking for unsigned overflow before comparing the required response size. A guest must have access to the emulated virtio-snd device; successful exploitation consumes unbounded host memory and can interrupt the host service.
The record
- CVE
- CVE-2026-3196
- Published
- Jun 19, 2026
- Updated
- Jun 19, 2026
- Vendor
- QEMU Project
- Product
- QEMU
- Classifications
- CWE-190, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 19, 2026CVE publishedPublication date reported by the CVE source.
- Jun 19, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=8.2.0 <=10.2.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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