Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter interrupts without first unregistering. So reject any request to enable interrupt forwarding if its already enabled for the zPCI device. This also fixes overwriting and thus leaking resources when the ioctl is called multiple times for the same device.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/591952b63a9f976da7d49f719f36ec826ee2a575
- https://git.kernel.org/stable/c/642d2d1067f7c4d753ae0e3ba5bc98b43cfe3c70
- https://git.kernel.org/stable/c/6837f0ae85fd54cf64c8a0c7c530bba2fae0a207
- https://git.kernel.org/stable/c/6be1ff49ba81f96a6fa55915e6d920be43ac57cc
- https://git.kernel.org/stable/c/78d9648e7e960546d5b72504a0b0358cd8bb1e9d
- https://git.kernel.org/stable/c/8fa01be5a6149404adb82c0979a78f6347edd3ef
FAQ
What is CVE-2026-74515?
CVE-2026-74515 is a vulnerability with a CVSS score of 8.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter in...
How severe is CVE-2026-74515?
CVE-2026-74515 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74515?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.