Riskcovery

CVE-2026-74515

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

State
Published
Severity
8.8 High
Published
Aug 15, 2026
Updated
Oct 16, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 642d2d1067f7c4d753ae0e3ba5bc98b43cfe3c70Affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 78d9648e7e960546d5b72504a0b0358cd8bb1e9dAffected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 6be1ff49ba81f96a6fa55915e6d920be43ac57ccAffected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 6837f0ae85fd54cf64c8a0c7c530bba2fae0a207Affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 591952b63a9f976da7d49f719f36ec826ee2a575Affected
  • 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to before 8fa01be5a6149404adb82c0979a78f6347edd3efAffected
LinuxLinux
  • 6.0Affected
  • before 6.0Not affected
  • 6.1.183 through 6.1.*Not affected
  • 6.6.151 through 6.6.*Not affected
  • 6.12.103 through 6.12.*Not affected
  • 6.18.44 through 6.18.*Not affected
  • 7.1.8 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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