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Review reviewHigh

CVE-2025-40048

Linux

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Let userspace take care of interrupt mask Remove the logic to set interrupt mask by default in uio_hv_generic driver as the interrupt mask value is supposed to be controlled completely by the user space. If the mask bit gets changed by the driver, concurrently with user mode operating on the ring, the mask bit may be set when it is supposed to be clear, and the user-mode driver will miss an interrupt which will cause a hang. For eg- when the driver sets inbound ring buffer interrupt mask to 1, the host does...

CVSS
7.5
EPSS
0.60%
45.4% percentile
CISA KEV
Not listed
Published
2025.10.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.60%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Let userspace take care of interrupt mask Remove the logic to set interrupt mask by default in uio_hv_generic driver as the interrupt mask value is supposed to be controlled completely by the user space. If the mask bit gets changed by the driver, concurrently with user mode operating on the ring, the mask bit may be set when it is supposed to be clear, and the user-mode driver will miss an interrupt which will cause a hang. For eg- when the driver sets inbound ring buffer interrupt mask to 1, the host does...

Affected product and versions

Product
Linux
Affected versions
>= 95096f2fbd10186d3e78a328b327afc71428f65f < 540aac117eaea5723cef5e4cbf3035c4ac654d92, >= 95096f2fbd10186d3e78a328b327afc71428f65f < 65d40acd911c7011745cbbd2aaac34eb5266d11e, >= 95096f2fbd10186d3e78a328b327afc71428f65f < a44f61f878f32071d6378e8dd7c2d47f9490c8f7, >= 95096f2fbd10186d3e78a328b327afc71428f65f < 01ce972e6f9974a7c76943bcb7e93746917db83a, >= 95096f2fbd10186d3e78a328b327afc71428f65f < 2af39ab5e6dc46b835a52e80a22d0cad430985e3, >= 95096f2fbd10186d3e78a328b327afc71428f65f < 37bd91f22794dc05436130d6983302cb90ecfe7e, >= 95096f2fbd10186d3e78a328b327afc71428f65f < e29587c07537929684faa365027f4b0d87521e1b, >= 95096f2fbd10186d3e78a328b327afc71428f65f < b15b7d2a1b09ef5428a8db260251897405a19496, >= 4.10
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available