CVE-2026-53063 Linux CVE debrief

Who should care

System administrators and users of Linux kernel versions 4.12 to 7.0.10, 6.1.175, 6.6.141, 6.12.91, and 6.18.33 should be aware of this vulnerability and take necessary actions to protect their systems. This includes applying patches, monitoring for potential issues, and considering compensating controls for systems that cannot be patched immediately.

Technical summary

The CVE-2026-53063 vulnerability is caused by incomplete logic in the invalidate_remove() function, which handles write hit bios after cache invalidation. The fix adds a new invalidate_committed() continuation to submit remapped writes to the cache origin after metadata commit completes. This maintains existing coherency and improves error handling in invalidate_complete(). Affected Linux kernel versions include 4.12 to 7.0.10, 6.1.175, 6.6.141, 6.12.91, and 6.18.33. The vulnerability has a CVSS score of 5.5 and a severity of MEDIUM.

Defensive priority

Medium priority should be given to patching Linux kernel versions 4.12 to 7.0.10, 6.1.175, 6.6.141, 6.12.91, and 6.18.33.

Recommended defensive actions

• Apply patches from Linux kernel stable branches
• Inventory Linux systems for affected kernel versions
• Monitor for potential write hang issues in passthrough mode
• Consider compensating controls for systems that cannot be patched immediately
• Review vendor guidance for patching and mitigation
• Perform asset inventory to identify potentially affected systems
• Track exceptions and retest remediated assets

Evidence notes

The CVE record was published on 2026-06-24T17:17:19.173Z and was last modified on 2026-07-21T17:36:23.310Z. The NVD entry is currently Analyzed. This vulnerability affects Linux kernel versions 4.12 to 7.0.10, 6.1.175, 6.6.141, 6.12.91, and 6.18.33. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity. The CVE record and NVD entry provide the most up-to-date information.

Official resources