CVE-2026-64411 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel-based systems, particularly those using affected versions, should assess exposure and prioritize patching or implementing compensating controls. This includes administrators of Linux-based servers, desktops, and embedded systems.

Why it matters

CVE-2026-64411 is a high-severity vulnerability in the Linux kernel's netfilter: ebtables component. It can lead to a stack-out-of-bounds read, potentially allowing information disclosure. Defenders should prioritize verifying exposure, applying patches, and implementing compensating controls.

• Verify and apply patches to prevent potential stack-out-of-bounds reads.
• Assess exposure through system inventory and vulnerability scanning.
• Implement compensating controls where patches are not immediately feasible.
• Monitor system logs for potential exploitation attempts.

Technical summary

The vulnerability is caused by a lack of null-termination in user-supplied table names passed to find_table_lock(). This can lead to a stack-out-of-bounds read when vsnprintf() reads past the stack object. The issue has been addressed through multiple patches in the Linux kernel. Affected Linux kernel versions should be reviewed for exposure, and patches should be applied or compensating controls implemented. The vulnerability has a high severity score of 7.1 and can potentially allow information disclosure. Defenders should prioritize verifying and applying patches for this vulnerability, particularly for systems using affected Linux kernel versions.

Defensive priority

Defenders should prioritize verifying and applying patches for this vulnerability, particularly for systems using affected Linux kernel versions. This involves reviewing system inventories, checking for exposure, and implementing compensating controls where patches are not immediately feasible.

Recommended defensive actions

• Verify system inventories for affected Linux kernel versions.
• Apply patches from the Linux kernel repository.
• Implement compensating controls for systems where patches are not immediately feasible.
• Monitor system logs for potential exploitation attempts.
• Review system inventory and vulnerability scanning results.
• Track exceptions and retest remediated assets.
• Confirm whether affected product deployments exist in managed environments.

Evidence notes

The vulnerability is confirmed through the Linux kernel's official source and CVE Program records. Evidence includes stack traces and code references from the Linux kernel repository. The issue arises from a lack of null-termination in user-supplied table names passed to find_table_lock(). This can lead to a stack-out-of-bounds read when vsnprintf() reads past the stack object. Affected systems should verify exposure and apply patches or implement compensating controls. The CVE record was published on 2026-07-25T08:50:52.143Z and has

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.