CVE-2026-3195 Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)
Heap buffer overflow in QEMU virtio-snd allows guest-to-host code execution or privilege escalation via audio input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-3195?
CVE-2026-3195 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 19 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-122
Which versions are affected by CVE-2026-3195?
How do I fix CVE-2026-3195?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-3195 being exploited?
There is no known exploitation of CVE-2026-3195 in the wild and no public exploit code.
Sources
Also known as AZL-91269, BELL-CVE-2026-3195, DEBIAN-CVE-2026-3195, GHSA-x3gf-fc58-4mvj, UBUNTU-CVE-2026-3195.