CVE-2026-23431 Linux CVE debrief

Who should care

Linux kernel users and administrators should be aware of this vulnerability and take steps to ensure their systems are updated with the latest kernel version. They should review system logs for potential memory leak issues and consider implementing additional monitoring and logging to detect potential memory leaks. This vulnerability affects Linux kernel users and administrators who need to ensure their systems are updated with the latest kernel version to prevent memory leaks.

Technical summary

The Linux kernel's spi: amlogic-spisg component is vulnerable to a memory leak due to a failure to call spi_controller_put() in several error paths. This issue has been resolved by converting to use devm_spi_alloc_host()/devm_spi_alloc_target(). The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM. Affected Linux kernel users and administrators should review system logs for potential memory leak issues and consider implementing additional monitoring and logging to detect potential memory leaks.

Defensive priority

Apply kernel updates to prevent memory leaks and review system logs for potential memory leak issues

Recommended defensive actions

• Apply kernel updates to ensure the latest version of the Linux kernel is running
• Review system logs for potential memory leak issues
• Consider implementing additional monitoring and logging to detect potential memory leaks
• Track exceptions and retest remediated assets
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-03T16:16:24.493Z and was last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Analyzed. This vulnerability affects Linux kernel users and administrators who need to ensure their systems are updated with the latest kernel version to prevent memory leaks. Evidence of the vulnerability's existence is based on the Linux kernel's spi: amlogic-spisg component and its failure to call spi_controller_put() in several error paths.

Official resources