PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-64150 Linux CVE debrief

The Linux kernel has a vulnerability that has been resolved in netfilter: nft_inner: release local_lock before re-enabling softirqs. In the error path, local_bh_enable() is called before local_unlock_nested_bh(). This vulnerability affects Linux kernel users and administrators, who should review their systems for potential impact. The issue involves the nft_inner module, where a local_lock is not released before re-enabling softirqs in the error path. This could potentially lead to a deadlock or other synchronization issues.

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-19
Original CVE updated
2026-07-19
Advisory published
2026-07-19
Advisory updated
2026-07-19

Who should care

Linux kernel users and administrators should review their systems for potential impact. They should ensure systems are updated with the latest kernel patches and monitor system logs for unusual activity related to netfilter and softirqs.

Technical summary

A vulnerability in the Linux kernel's netfilter component has been addressed. The issue involves the nft_inner module, where a local_lock is not released before re-enabling softirqs in the error path. This could potentially lead to a deadlock or other synchronization issues. Linux kernel users and administrators should review their systems for potential impact and ensure systems are updated with the latest kernel patches.

Defensive priority

Medium

Recommended defensive actions

  • Review Linux kernel configurations and versions for potential impact
  • Ensure systems are updated with the latest kernel patches
  • Monitor system logs for unusual activity related to netfilter and softirqs
  • 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 2026-07-19T16:17:56.970Z and has not been modified since then. The NVD entry is currently Received. There is limited evidence available, and defenders should verify the affected scope and severity with the official CVE record and vendor guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-19T16:17:56.970Z and has not been modified since then.