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Review reviewHigh

CVE-2026-46280

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: lib: test_hmm: evict device pages on file close to avoid use-after-free Patch series "Minor hmm_test fixes and cleanups". Two bugfixes a cleanup for the HMM kernel selftests. These were mostly reported by Zenghui Yu with special thanks to Lorenzo for analysing and pointing out the problems. This patch (of 3): When dmirror_fops_release() is called it frees the dmirror struct but doesn't migrate device private pages back to system memory first. This leaves those pages with a dangling zone_device_data pointer to the freed dmir...

CVSS
7.8
EPSS
0.13%
2.64% percentile
CISA KEV
Not listed
Published
2026.06.09
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: lib: test_hmm: evict device pages on file close to avoid use-after-free Patch series "Minor hmm_test fixes and cleanups". Two bugfixes a cleanup for the HMM kernel selftests. These were mostly reported by Zenghui Yu with special thanks to Lorenzo for analysing and pointing out the problems. This patch (of 3): When dmirror_fops_release() is called it frees the dmirror struct but doesn't migrate device private pages back to system memory first. This leaves those pages with a dangling zone_device_data pointer to the freed dmir...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= b2ef9f5a5cb37643ca5def3516c546457074b882 < 234071b4318feaeb27cd2e4e1b16ef6b055adf89, >= b2ef9f5a5cb37643ca5def3516c546457074b882 < bf477abd448c76bb8ea51c9b4f63a3a17c4b6239, >= b2ef9f5a5cb37643ca5def3516c546457074b882 < 5846715b6382dd4c6a69b35a56ca6115d33bc2a0, >= b2ef9f5a5cb37643ca5def3516c546457074b882 < 38f113f81d3f0adc658a4475dd3ecaec985e21d3, >= b2ef9f5a5cb37643ca5def3516c546457074b882 < 9de1eb0aac2862d6144b8db0ec1388e79f8bc3e1, >= b2ef9f5a5cb37643ca5def3516c546457074b882 < 744dd97752ef1076a8d8672bb0d8aa2c7abc1144, >= 5.8, >= 5.8 < 6.1.176, >= 6.2 < 6.6.140, >= 6.7 < 6.12.86, >= 6.13 < 6.18.27, >= 6.19 < 7.0.4
Fixed versions
6.1.176, 6.6.140, 6.12.86, 6.18.27, 7.0.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel 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
CWE-416
CVE-2026-46280 — Linux Linux, linux kernel | SECUFOCUS NOW