CVE-2026-64023 Linux CVE debrief

Who should care

Linux kernel users and maintainers, as well as security teams and operators, should be aware of this vulnerability and take steps to mitigate it. They should review the official advisory and apply patches or updates as recommended.

Technical summary

The Linux kernel's gpio aggregator has a use-after-free vulnerability. When an error occurs, the code frees aggr->lookups->dev_id before removing the entry from the lookup table. If a concurrent thread calls gpiod_find() before the entry is removed, it could lead to a use-after-free condition. This could potentially allow an attacker to execute arbitrary code or cause a denial of service. The vulnerability affects Linux kernel users and maintainers.

Defensive priority

High

Recommended defensive actions

• Update the Linux kernel to the latest version
• Apply patches from the Linux kernel maintainers
• Monitor for potential exploitation attempts
• 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 2026-07-19T16:17:42.317Z and has not been modified since then. The NVD entry is currently Received. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the official advisory.

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.