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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-93076

dax/fsdev: clear vmemmap_shift when binding static pgmap

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: dax/fsdev: clear vmemmap_shift when binding static pgmap Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static device from device_dax (which may set vmemmap_shift based on alignment) to fsdev_dax, the stale vmemmap_shift persists on the shared pgmap. Explicitly zero it before devm_memremap_pages() so the vmemmap is built for order-0 folios as fsdev requires.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d5406bd458b0ac10b1301a4d5801d85c8f648637 to < d298a0513aaf7d48f2a9f4a90041de910750cfcfaffected
  • d5406bd458b0ac10b1301a4d5801d85c8f648637 to < e0239229931faf9ca3367e3befcf16f77b2cd45baffected

Linux Linux

Default version status: affected

  • 7.1affected
  • 0 to < 7.1unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References