{"id":"CVE-2026-74515","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74515","generatedAt":"2026-10-28T08:27:55.344Z","title":"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.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Reject adapter interrupt forwarding if already enabled\n\nThe MPCIFC instruction doesn't allow registering adapter interrupts without\nfirst unregistering. So reject any request to enable interrupt forwarding\nif its already enabled for the zPCI device. This also fixes overwriting and\nthus leaking resources when the ioctl is called multiple times for the same\ndevice.","published":"2026-08-15T13:17:57.000Z","lastModified":"2026-10-16T20:17:34.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00129,"percentile":0.02535,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/591952b63a9f976da7d49f719f36ec826ee2a575","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/642d2d1067f7c4d753ae0e3ba5bc98b43cfe3c70","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6837f0ae85fd54cf64c8a0c7c530bba2fae0a207","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6be1ff49ba81f96a6fa55915e6d920be43ac57cc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/78d9648e7e960546d5b72504a0b0358cd8bb1e9d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8fa01be5a6149404adb82c0979a78f6347edd3ef","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74515","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}