Use of Uninitialized Variable in Linux kernel - CVE-2026-23282
Published: March 25, 2026
Vulnerability identifier: #VU124584
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23282
CWE-ID: CWE-457
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 user to cause a denial of service.
The vulnerability exists due to improper initialization of variables in the SMB2 client implementation when handling failed SMB2 open or close operations. A local user can trigger a use of uninitialized memory to cause a denial of service.
The issue occurs when SMB2_open_init() or SMB2_close_init() fails during operations such as reconnect, leaving iovs in the request structure uninitialized, which can lead to a kernel oops when freed or accessed.
How to mitigate CVE-2026-23282
Install security update from vendor's repository.