CVE-2026-23292 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and system administrators should assess exposure and apply patches to prevent potential recursive locking issues. Defenders should verify Linux kernel versions, review patch details, and monitor system logs for potential issues. Affected operators and security teams should prioritize patching and review compensating controls.

Why it matters

A vulnerability in the Linux kernel could lead to recursive locking in the __configfs_open_file() function. Defenders should assess exposure, apply patches, and monitor system logs.

• Defenders should verify Linux kernel versions and apply patches to prevent recursive locking.
• System administrators should monitor system logs for potential recursive locking issues.
• Linux kernel maintainers should review and apply patches to affected kernel versions.

Technical summary

The target_core_item_dbroot_store() function tries to validate a new file path by opening the file, but ends up trying to acquire the same semaphore it already holds, leading to recursive locking. This was resolved by modifying the function to use kern_path() instead of filp_open(). The fix prevents recursive locking by avoiding the use of __configfs_open_file(). Linux kernel maintainers and users should assess exposure and apply patches to prevent potential recursive locking issues. The fix is compatible with existing kernel versions.

Defensive priority

Linux kernel maintainers and users should assess exposure and apply patches to prevent potential recursive locking issues.

Recommended defensive actions

• Review and apply patches provided by the Linux kernel maintainers.
• Assess exposure and prioritize patching for systems using affected kernel versions.
• Monitor system logs for potential recursive locking issues.
• Verify Linux kernel versions and configurations.
• Check for compensating controls for exposed systems.
• Track exceptions and retest remediated assets.
• technicalSummary

Evidence notes

The CVE record and source references provide details on the vulnerability and patches. However, the corpus does not establish versions, exploitation, impact, or remediation beyond patch application. Linux kernel maintainers and users should verify affected versions, review patch details, and apply patches. Evidence is limited; defenders should monitor logs and assess exposure.

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.