PT-2026-29036 · Microsoft · Virtio-Win

Konstantin Kostiuk + 1 · Published 2026-03-30 · Updated 2026-04-28 · CVE-2026-5165

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions virtio-win (affected versions not specified)

Description A memory management issue exists in the VirtIO Block (BLK) device within virtio-win. A reset of the device does not properly handle memory, leading to a use-after-free condition. This could allow a local attacker to corrupt system memory, potentially causing system instability or unexpected behavior.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-825

Related Identifiers

CVE-2026-5165

Affected Products

Virtio-Win

References · 8

• https://bugzilla.redhat.com/show_bug.cgi?id=2453015 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5165 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-5165 · Vendor Advisory
• https://github.com/virtio-win/kvm-guest-drivers-windows/pull/1493 · Note
• https://twitter.com/cyberbivash/status/2038650034154054028 · Twitter Post
• https://twitter.com/infoflowcloud/status/2039006975694963181 · Twitter Post
• https://twitter.com/CVEnew/status/2039004530445054256 · Twitter Post
• https://t.me/cveNotify/161252 · Telegram Post