KVM: s390: Take srcu when importing watchpoint data
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Take srcu when importing watchpoint data __import_wp_info() backs up the original guest memory contents of a watchpoint with read_guest_abs(), which is kvm_read_guest() and therefore resolves the memslot via __kvm_memslots(). That requires kvm->srcu (or kvm->slots_lock) to be held, otherwise a concurrent memslot update can free the memslots array under us once its SRCU grace period has elapsed. As this is not fast path, following lock ordering (mutex first, then srcu) take the big hammer and hold the srcu for the full import.
CVE-2026-89922
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-2026-89922
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": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "6830fbc3724bf49c142aae69a4694f115fa9cedd",
"versionType": "git"
},
{
"status": "affected",
"version": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "f8e3a9997d5ecd56ebe4b262ff424516c068fecb",
"versionType": "git"
},
{
"status": "affected",
"version": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03",
"versionType": "git"
},
{
"status": "affected",
"version": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "cc710ee45395efb4937e042960f791d33924e5f6",
"versionType": "git"
},
{
"status": "affected",
"version": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "4c05bf21d1806853e662cc19e744736a3408f155",
"versionType": "git"
},
{
"status": "affected",
"version": "27291e2165b6de70c476b7b675308113edd69a60",
"lessThan": "a4e482def8533ebace517d9f67f1465841b1f982",
"versionType": "git"
}
],
"programFiles": [
"arch/s390/kvm/kvm-s390.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/s390/kvm/kvm-s390.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89922
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36367 · Revision 1
- Added to Heist Feed
- Publisher date