KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix IRQ injection with SIGP Stop and Store Status When __inject_sigp_stop() is called for a Stop and Store Status operation, if the vCPU is running, the interrupt is marked as pending and the status is stored by the thread performing the KVM_RUN IOCTL. If the vCPU is already stopped, the status is stored immediately. Storing the status means writing into userspace, which might fault, and __inject_sigp_stop() is called from do_inject_vcpu() which in turn is always called holding a spinlock, which is obviously an issue. Fix this by returning -EWOULDBLOCK from __inject_sigp_stop(), and adding a bool flag to indicate whether a store status is needed. The callers of do_inject_vcpu() are modified to pass the pointer to the bool flag; whenever a Store Status operation is needed, the callers can now perform it outside the spinlock. Opportunistically refactor kvm_s390_set_irq_state() to use scoped_guard() and __free(). [ Added Fixes tag while picking -- Claudio ]
CVE-2026-98930
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-2026-98930
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": "6cddd432e3da5e25eccbc13844d03c871674a62e",
"lessThan": "3bd77c59576b1d447fd56cc689ae9523a334b924",
"versionType": "git"
},
{
"status": "affected",
"version": "6cddd432e3da5e25eccbc13844d03c871674a62e",
"lessThan": "a379ac504fcb8c6fc2aa36203f5489b9581eb2e0",
"versionType": "git"
},
{
"status": "affected",
"version": "6cddd432e3da5e25eccbc13844d03c871674a62e",
"lessThan": "d0e3bf633f0585a0c2c2105ea7723777d764fae5",
"versionType": "git"
},
{
"status": "affected",
"version": "6cddd432e3da5e25eccbc13844d03c871674a62e",
"lessThan": "d343407b728a80b74be3c24b59f15e60289ea527",
"versionType": "git"
}
],
"programFiles": [
"arch/s390/kvm/interrupt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"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/interrupt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98930
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52790 · Revision 1
- Added to Heist Feed
- Publisher date