CVE-2026-64005 Linux CVE debrief

Who should care

Users of the Linux kernel should be aware of this vulnerability and take necessary precautions. The vulnerability has been resolved, and users should apply the patches or updates provided by the vendor.

Technical summary

The vulnerability is caused by the re-initialization of smc hashtables 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. The vulnerability has been resolved by removing the unnecessary re-initialization of smc hashtables. The affected product is the Linux kernel. Users of the Linux kernel should be aware of this vulnerability and take necessary precautions. The re-initialization is unnecessary and can be removed, and the vulnerability has been resolved by this change. Additional verification and defensive measures are recommended to ensure the security of the system.

Defensive priority

Medium

Recommended defensive actions

• Inventory and assess Linux kernel usage
• Apply vendor patches or updates
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-19T16:17:40.170Z and has not been modified since then. The NVD entry is currently Received. The vulnerability is related to the re-initialization of smc hashtables in the Linux kernel, which can lead to a corrupted list. The re-initialization is unnecessary and can be removed. The affected product is the Linux kernel. The vulnerability has been resolved.

Official resources