Riskcovery

CVE-2026-98653

KVM: s390: Fix _gaccess_shadow_fault()

State
Published
Severity
Not scored
Published
Oct 18, 2026
Updated
Oct 19, 2026
Reserved
Sep 25, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Fix _gaccess_shadow_fault()

In some circumstances, it is possible that the page of nested guest memory that is being shadowed is not present at all in the parent guest gmap. dat_entry_walk() will not find any leaf entry and return with -ENOENT, which will erroneously be propagated all the way to userspace.

Fix by manually calling gmap_link() on the memory of the nested guest that is being shadowed if the mapping was not already present.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • e38c884df92119d96f652d51f82661dd2fc0b885 to before 94c43c7df46433ed4d1e18f13770b019ba977bd8Affected
  • e38c884df92119d96f652d51f82661dd2fc0b885 to before faff4c8ff3dbec6d71b89dd281a0d17c4478fa44Affected
LinuxLinux
  • 7.0Affected
  • before 7.0Not affected
  • 7.2.9 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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