KVM: s390: Fix _gaccess_shadow_fault()
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.
CVE-2026-98653
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98653
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e38c884df92119d96f652d51f82661dd2fc0b885",
"lessThan": "94c43c7df46433ed4d1e18f13770b019ba977bd8",
"versionType": "git"
},
{
"status": "affected",
"version": "e38c884df92119d96f652d51f82661dd2fc0b885",
"lessThan": "faff4c8ff3dbec6d71b89dd281a0d17c4478fa44",
"versionType": "git"
}
],
"programFiles": [
"arch/s390/kvm/s390/gaccess.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/s390/kvm/s390/gaccess.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98653
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38673 · Revision 1
- Added to Heist Feed
- Publisher date