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Review reviewHigh

CVE-2024-26620

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: always filter entire AP matrix The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID w...

CVSS
7.5
EPSS
0.63%
46.6% percentile
CISA KEV
Not listed
Published
2024.03.12
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.63%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: always filter entire AP matrix The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID w...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 48cae940c31d2407d860d87c41d5f9871c0521db < d6b8d034b576f406af920a7bee81606c027b24c6, >= 48cae940c31d2407d860d87c41d5f9871c0521db < c69d821197611678533fb3eb784fc823b921349a, >= 48cae940c31d2407d860d87c41d5f9871c0521db < cdd134d56138302976685e6c7bc4755450b3880e, >= 48cae940c31d2407d860d87c41d5f9871c0521db < 850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11, >= 6.0, >= 6.0 < 6.1.76, >= 6.2 < 6.6.15, >= 6.7 < 6.7.3
Fixed versions
6.1.76, 6.6.15, 6.7.3

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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-787
CVE-2024-26620 — Linux Linux, linux kernel | SECUFOCUS NOW