Improper Initialization in Linux kernel - CVE-2026-64005
Published: July 20, 2026
Vulnerability identifier: #VU138635
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-2026-64005
CWE-ID: CWE-665
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 in the SMC hash tables in net/smc/af_smc.c when initializing the SMC subsystem. A local user can trigger use of corrupted hash list state to cause a denial of service.
The issue can occur when the hash tables are re-initialized after hash entries already exist and are in use, potentially resulting in a corrupted list.
How to mitigate CVE-2026-64005
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0cc9d0ac22d02f1ba1884de5d6de9eaf8b45d82d
- https://git.kernel.org/stable/c/2006605006e5a4a11d93e1ebdbbe95764d24276f
- https://git.kernel.org/stable/c/55cba6b883b41e5922c00ba9d4e3262131f46f1b
- https://git.kernel.org/stable/c/5ec939367e700722ffbb1b7cacccbb1a3cf0ebd1
- https://git.kernel.org/stable/c/64c96e497d5ada0b90e99bf58f893aa2b73dcfbc
- https://git.kernel.org/stable/c/9e4389b0038781f19f97895186ed941ff8ac1678
- https://git.kernel.org/stable/c/cdc79c05cc375f68ae87b0c74fdaac1a5c93155a
- https://git.kernel.org/stable/c/ed7a758313011885347b854e97cb95903ef3c3f7