CVE-2026-3195: Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-19 · updated 2026-09-01
Weakness: CWE-122

Description

A flaw was found in QEMU. When reading input audio in the virtio-snd device input callback, the `virtio_snd_pcm_in_cb` function did not check whether the iov could fit the data buffer, potentially leading to a heap out-of-bounds write. This issue exists due to an incomplete fix for CVE-2024-7730.

References

https://access.redhat.com/security/cve/CVE-2026-3195
https://bugzilla.redhat.com/show_bug.cgi?id=2443817
https://access.redhat.com/security/cve/CVE-2026-3195
https://bugzilla.redhat.com/show_bug.cgi?id=2443817
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3195.json

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