Improper initialization in Linux kernel - CVE-2026-98174
Published: October 7, 2026
Vulnerability identifier: #VU153841
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98174
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper initialization in the SMB client's TCP_Server_Info.rlist when adding a server node to the reconnection list. A local user can trigger reconnection processing involving an improperly initialized node to cause a denial of service.
The zero-initialized list pointers cause list_empty() to return false and list_add() to dereference a NULL prev pointer.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98174
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/04082b1833856cb9ed87e0d3d5f04cbf836cf7da
- https://git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83
- https://git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1
- https://git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d
- https://git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f