CVE-2026-98930 (GCVE-0-2026-98930)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:08 – Updated: 2026-10-23 12:08
VLAI
Title
KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
Summary
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 ]
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6cddd432e3da5e25eccbc13844d03c871674a62e , < 3bd77c59576b1d447fd56cc689ae9523a334b924 (git)
Affected: 6cddd432e3da5e25eccbc13844d03c871674a62e , < a379ac504fcb8c6fc2aa36203f5489b9581eb2e0 (git)
Affected: 6cddd432e3da5e25eccbc13844d03c871674a62e , < d0e3bf633f0585a0c2c2105ea7723777d764fae5 (git)
Affected: 6cddd432e3da5e25eccbc13844d03c871674a62e , < d343407b728a80b74be3c24b59f15e60289ea527 (git)
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Linux Linux Affected: 4.0
Unaffected: 0 , < 4.0 (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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        }
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    "datePublished": "2026-10-23T12:08:17.513Z",
    "dateReserved": "2026-09-25T10:25:14.380Z",
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          }
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}



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