CVE-2026-74515
KVM: s390: pci: Reject adapter interrupt forwarding if already enabled
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
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Affected Versions
Linux / Linux
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 78d9648e7e960546d5b72504a0b0358cd8bb1e9d 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 6be1ff49ba81f96a6fa55915e6d920be43ac57cc 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 6837f0ae85fd54cf64c8a0c7c530bba2fae0a207 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 591952b63a9f976da7d49f719f36ec826ee2a575 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc < 8fa01be5a6149404adb82c0979a78f6347edd3ef
Linux / Linux
6.0
References
git.kernel.org: https://git.kernel.org/stable/c/78d9648e7e960546d5b72504a0b0358cd8bb1e9d git.kernel.org: https://git.kernel.org/stable/c/6be1ff49ba81f96a6fa55915e6d920be43ac57cc git.kernel.org: https://git.kernel.org/stable/c/6837f0ae85fd54cf64c8a0c7c530bba2fae0a207 git.kernel.org: https://git.kernel.org/stable/c/591952b63a9f976da7d49f719f36ec826ee2a575 git.kernel.org: https://git.kernel.org/stable/c/8fa01be5a6149404adb82c0979a78f6347edd3ef