Use of uninitialized resource in Linux kernel - CVE-2026-46207
Published: May 29, 2026
Vulnerability identifier: #VU132983
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46207
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local attacker to disclose sensitive information.
The vulnerability exists due to uninitialized memory exposure in virtio_transport_build_skb() when processing non-linear skbs for delivery to the vsockmon tap device. A local attacker can trigger handling of a specially crafted non-linear skb to disclose sensitive information.
The issue affects payload copying to the monitor interface, where no payload is copied and data remains uninitialized.
How to mitigate CVE-2026-46207
Install security update from vendor's repository.