CVE-2026-97485 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux systems with omfs filesystem support should verify block size handling in affected versions and apply patches if necessary. They should also assess the need for patches or updates to ensure proper handling of block sizes greater than PAGE_SIZE.

Why it matters

A vulnerability in the Linux kernel has been resolved, related to handling set_blocksize failures in the omfs filesystem. Linux kernel developers and maintainers should verify block size handling in affected versions and apply patches if necessary.

• Verify block size handling in Linux kernel versions using omfs to prevent potential BUG_ON errors.
• Assess the need for patches or updates to ensure proper handling of block sizes greater than PAGE_SIZE.

Technical summary

The Linux kernel has a resolved vulnerability related to handling set_blocksize failures in the omfs filesystem. The issue arises from the use of buffer_heads, which do not handle block sizes greater than PAGE_SIZE well, potentially leading to a BUG_ON error in folio_set_bh. Linux kernel developers and maintainers should verify block size handling in affected versions and apply patches if necessary. The vulnerability can lead to a BUG_ON error in folio_set_bh during the first __bread_gfp call when mounting. The CVE record was published on 2026-09-24T17:17:26.050Z and was last modified on 2026-09-28T06:16:34.497Z.

Defensive priority

Low priority, verify block size handling in Linux kernel versions using omfs.

Recommended defensive actions

• Verify Linux kernel versions using omfs and assess block size handling.
• Review and apply patches from the Linux kernel repository if necessary.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• 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.

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The Linux kernel's official repository has references to the commits that resolve the issue. Further verification is needed to assess the impact and ensure proper handling of block sizes greater than PAGE_SIZE. Linux kernel developers should verify block size handling in affected versions and apply patches if necessary. The commits that resolve the issue can be found in the Linux kernel repository.

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.