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Review reviewHigh

CVE-2025-40051

Linux

In the Linux kernel, the following vulnerability has been resolved: vhost: vringh: Modify the return value check The return value of copy_from_iter and copy_to_iter can't be negative, check whether the copied lengths are equal.

CVSS
7.8
EPSS
0.15%
5.07% 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 probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: vhost: vringh: Modify the return value check The return value of copy_from_iter and copy_to_iter can't be negative, check whether the copied lengths are equal.

Affected product and versions

Product
Linux
Affected versions
>= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < db042925a5ab7a550b710addeadbf6f72e3a8a4b, >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 78dc7362662fedaa1928fb8e4f27401c8322905d, >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < baa37b1c7e29546f79c39bef0d18c4edc9f39bb1, >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < cfa0654402c06d086201a9ff167eb95da5844fc3, >= 309bba39c945ac8ab8083ac05cd6cfe5822968e0 < 82a8d0fda55b35361ee7f35b54fa2b66d7847d2b, >= 6.0
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available