SB2026072774 - Out-of-bounds read in Linux kernel virtio

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64490)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to out-of-bounds access in virtio-snd control handling in sound/virtio/virtio_kctl.c when processing device-provided control metadata. A local user can provide a malicious or buggy virtio sound device that advertises an invalid control type or an oversized value count to cause a denial of service.

Exploitation requires the presence of a virtio sound device that supplies crafted control metadata to the guest kernel.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a
• https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1
• https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9
• https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271