SECUFOCUSNOW
Home›CVE index›CVE-2023-54092
Review reviewHigh

CVE-2023-54092

Linux

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390_replace_asce(), the index of the new ASCE should also be set to 0. Having the wrong index might lead to the wrong addresses being passed around when notifying pte invalidations, and eventually to validity intercepts (VM crash) if the prefix gets unmapped and the notifier gets called with the wrong address.

CVSS
8.8
EPSS
0.18%
7.99% percentile
CISA KEV
Not listed
Published
2025.12.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.18%
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390_replace_asce(), the index of the new ASCE should also be set to 0. Having the wrong index might lead to the wrong addresses being passed around when notifying pte invalidations, and eventually to validity intercepts (VM crash) if the prefix gets unmapped and the notifier gets called with the wrong address.

Affected product and versions

Product
Linux
Affected versions
>= 9d216035d173214cd33712d67d89220ef2283ebf < 8e635da0e0d3cb45e32fa79b36218fb98281bc10, >= 81ea65c9aefe100a9ace3082649bd84ae7dd9764 < 49a2686adddebe1ae76b4d368383208656ef6606, >= faa2f72cb3569256480c5540d242c84e99965160 < 017f686bcb536ff23d49c143fdf9d1fd89a9a924, >= faa2f72cb3569256480c5540d242c84e99965160 < f1c7a776338f2ac5e34da40e58fe9f33ea390a5e, >= faa2f72cb3569256480c5540d242c84e99965160 < c2fceb59bbda16468bda82b002383bff59de89ab, >= b5477f53e1d4de6191f50748a027251b14952eeb, >= 63c71e83d5b6ab8adb5fcebef977052048016957, >= 5.10.137 < 5.10.190, >= 5.15.61 < 5.15.124, >= 5.18.18 < 5.19, >= 5.19.2 < 5.20, >= 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:C/C:H/I:H/A:H
CWE
Not available