CVE-2025-68293

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: fix NULL pointer deference when splitting folio Commit c010d47f107f ("mm: thp: split huge page to any lower order pages") introduced an early check on the folio's order via mapping->flags before proceeding with the split work. This check introduced a bug: for shmem folios in the swap cache and truncated folios, the mapping pointer can be NULL. Accessing mapping->flags in this state leads directly to a NULL pointer dereference. This commit fixes the issue by moving the check for mapping != NULL before any attempt to access mapping->flags.

Package Linux Kernel
Published 2025-12-16
Last modified 2026-04-15
Patch available
Yes

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.12.61, 6.17.11, 6.18 and their respective stable series.

Affected from
≥ 6.9
Fixed in
✓ 6.12.61 6.12.x ✓ 6.17.11 6.17.x ✓ 6.18

References

The following references provide additional information about CVE-2025-68293 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2025-68293?

    CVE-2025-68293 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.61, 6.17.11 and 6.18. CVE-2025-68293 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2025-68293?

    Yes — CVE-2025-68293 has been patched. Fixed versions include 6.12.61, 6.17.11 and 6.18. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2025-68293 actively exploited?

    No — CVE-2025-68293 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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