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CVE-2023-54092

HIGHCVSS 8.8/10EPSS 0.22%

Last modified

CVE-2023-54092 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.22%

12.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 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
LinuxLinux6.0

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-54092?
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.
How severe is CVE-2023-54092?
CVE-2023-54092 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2023-54092?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST