CVE-2026-64005
Received Received - Intake

Kernel Memory Corruption in Linux SMC Subsystem

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net/smc: Do not re-initialize smc hashtables INIT_HLIST_HEAD(&smc_v*_hashinfo.ht) are called after smc_nl_init(), proto_register() and sock_register(). This can lead to smc_v*_hashinfo.ht being reset even though hash entries already exist and are being used, possibly resulting in a corrupted list. Remove unnecessary and dangerous re-initialisation of smc_v*_hashinfo.ht in smc_init(); it is implicitly initialised to zero anyhow. Add HLIST_HEAD_INIT to the definitions for clarity.

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64005
EUVD
EUVD-2026-45578

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves improper re-initialization of SMC (Socket Direct) hashtables. The issue occurs when INIT_HLIST_HEAD is called after other initialization steps, potentially resetting existing hash entries and corrupting the list.

Detection Guidance

This vulnerability affects the Linux kernel's SMC (Socket Messaging Channel) module. Detection requires checking kernel logs for SMC-related errors or crashes, such as corrupted hashtable entries or list corruption warnings. Commands like dmesg | grep smc or journalctl -k | grep smc may help identify issues. Ensure your kernel version is checked against the patched version.

Impact Analysis

This could lead to system instability or crashes due to corrupted data structures in the kernel. It may cause network-related services using SMC to malfunction or fail.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it pertains to a low-level kernel networking issue without clear implications for data protection or privacy requirements.

Mitigation Strategies

Immediately update the Linux kernel to the latest stable version that includes the fix for this vulnerability. If updating is not immediately possible, consider disabling the SMC module by blacklisting it or restricting its use via kernel parameters until the update is applied.

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