CVE-2026-98930KVM: s390: Fix IRQ injection with SIGP Stop and Store Status
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 ]
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 23, 2026
- First seen by InfoSec Signals
- Oct 23, 2026
Affected products
Linux Linux linux:linux (from the name) | 6cddd432e3da5e25eccbc13844d03c871674a62e builds before 3bd77c59576b1d447fd56cc689ae9523a334b924; from 6cddd432e3da5e25eccbc13844d03c871674a62e before a379ac504fcb8c6fc2aa36203f5489b9581eb2e0; from 6cddd432e3da5e25eccbc13844d03c871674a62e before d0e3bf633f0585a0c2c2105ea7723777d764fae5; from 6cddd432e3da5e25eccbc13844d03c871674a62e before d343407b728a80b74be3c24b59f15e60289ea527 | CNA record |
References
- https://git.kernel.org/stable/c/3bd77c59576b1d447fd56cc689ae9523a334b924
- https://git.kernel.org/stable/c/a379ac504fcb8c6fc2aa36203f5489b9581eb2e0
- https://git.kernel.org/stable/c/d0e3bf633f0585a0c2c2105ea7723777d764fae5
- https://git.kernel.org/stable/c/d343407b728a80b74be3c24b59f15e60289ea527
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.