Use of Uninitialized Variable in Linux kernel - CVE-2026-97929
Published: September 28, 2026
Vulnerability identifier: #VU152538
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97929
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to disclose sensitive information.
The vulnerability exists due to use of uninitialized heap data in the i_usx2y_in04_int() interrupt callback when handling a short transfer from a USB device. An attacker with physical access can cause a short transfer to disclose sensitive information.
The uninitialized data is copied to the mmap-accessible ctl_snapshot[] array.
Affected software
Linux kernel
How to mitigate CVE-2026-97929
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3