CVEvulnerability
CVE-2023-54092
8.8 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2025-12-24
- Last modified
- 2026-10-15
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
References
- https://git.kernel.org/stable/c/017f686bcb536ff23d49c143fdf9d1fd89a9a924 git.kernel.org
- https://git.kernel.org/stable/c/49a2686adddebe1ae76b4d368383208656ef6606 git.kernel.org
- https://git.kernel.org/stable/c/8e635da0e0d3cb45e32fa79b36218fb98281bc10 git.kernel.org
- https://git.kernel.org/stable/c/c2fceb59bbda16468bda82b002383bff59de89ab git.kernel.org
- https://git.kernel.org/stable/c/f1c7a776338f2ac5e34da40e58fe9f33ea390a5e git.kernel.org