KVM: s390: pci: Reject adapter interrupt forwarding if already enabled

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Summary

CVECVE-2026-74515
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:56 UTC
Updated2026-08-15 13:17:56 UTC
DescriptionIn 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 Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc 78d9648e7e960546d5b72504a0b0358cd8bb1e9d git Not specified
CNA Linux Linux affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc 6be1ff49ba81f96a6fa55915e6d920be43ac57cc git Not specified
CNA Linux Linux affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc 6837f0ae85fd54cf64c8a0c7c530bba2fae0a207 git Not specified
CNA Linux Linux affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc 591952b63a9f976da7d49f719f36ec826ee2a575 git Not specified
CNA Linux Linux affected 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc 8fa01be5a6149404adb82c0979a78f6347edd3ef git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.6.151 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc6 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/591952b63a9f976da7d49f719f36ec826ee2a575 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8fa01be5a6149404adb82c0979a78f6347edd3ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6837f0ae85fd54cf64c8a0c7c530bba2fae0a207 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/78d9648e7e960546d5b72504a0b0358cd8bb1e9d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6be1ff49ba81f96a6fa55915e6d920be43ac57cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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