Use of Uninitialized Variable in Linux kernel - CVE-2026-97610
Published: September 28, 2026
Vulnerability identifier: #VU152586
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97610
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect error reporting.
The vulnerability exists due to use of an uninitialized return value in netfs_unbuffered_write() when preparing the first subrequest for a synchronous write fails. A local user can trigger a synchronous CIFS write for which request preparation fails to cause incorrect error reporting.
The issue is reachable when cifs_prepare_write() fails to reopen the file or obtain credits.
Affected software
Linux kernel
How to mitigate CVE-2026-97610
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3