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CVE-2026-93076

dax/fsdev: clear vmemmap_shift when binding static pgmap

N/A
Published: September 17, 2026 at 04:10 PM UTC
Updated: October 19, 2026 at 10:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
7.1d5406bd458b0ac10b1301a4d5801d85c8f648637
Vendor states this is fixed in d298a0513aaf7d48f2a9f4a90041de910750cfcf (fixed)
Vendor states this is fixed in e0239229931faf9ca3367e3befcf16f77b2cd45b (fixed)
Vendor states this is fixed in 7.1 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://git.kernel.org/stable/c/d298a0513aaf7d48f2a9f4a90041de910750cfcf
Source: cverecord
https://git.kernel.org/stable/c/e0239229931faf9ca3367e3befcf16f77b2cd45b

Quick Info

StatusRECEIVED

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