Bug 2443817 (CVE-2026-3195) - CVE-2026-3195 qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for CVE-2024-7730)
Summary: CVE-2026-3195 qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in...
Keywords:
Status: NEW
Alias: CVE-2026-3195
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2443819 2443818
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-02 13:47 UTC by OSIDB Bzimport
Modified: 2026-03-02 13:58 UTC (History)
1 user (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-03-02 13:47:43 UTC 
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.

Original issue:
https://gitlab.com/qemu-project/qemu/-/issues/2427

Upstream patch series:
https://lore.kernel.org/qemu-devel/20260220-virtio-snd-series-v1-0-207c4f7200a2@linaro.org/

QEMU fix commits:
https://gitlab.com/qemu-project/qemu/-/commit/bcb53328aa70023f1405fade4e253e7f77567261
https://gitlab.com/qemu-project/qemu/-/commit/7994203bb1b83a6604f3ab00fe9598909bb66164
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