{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-90007",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-90007"
  ],
  "published": "2026-09-16T10:32:03Z",
  "summary": "scsi: pm8001: Use rollback index when freeing MSI-X vectors",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: pm8001: Use rollback index when freeing MSI-X vectors\n\npm8001_request_msix() unwinds previously registered handlers with\nfree_irq() when request_irq() fails. The rollback loop uses the failing\nindex i for every iteration instead of the already registered vector\nindex j.\n\nThat passes the wrong IRQ/dev_id pair to free_irq() and leaves the\nearlier handlers installed. Use j for both pci_irq_vector() and the\nmatching irq_vector entry in the rollback loop.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90007"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f39e3ca1f688d7c08954a0794e9bf1e279c83b15"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a980dec7c69990e4f119bcf6a2ea093d1c4975e8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0205db768570f9a46b20912afa581a0c7a63d8b7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2853ce9c88e0e6dd575f95f28b3a8c2b27164115"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fb22a8d2f3ac6665cc8bee197096b6675cac1a9f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dd817463c9b42a3a9e23d15b86c6c77a6cfb809d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e20b16aa3b49f9db5510940740255a987e6f2a6f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3f92a64545165bdbb36dee8fa35626b295463313"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-16T14:40:32Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The bug is in pm8001_request_msix() on the PCI SAS HBA probe and resume path (pm8001_pci_probe/pm8001_pci_resume \u2192 pm8001_alloc/pm8001_request_irq), not in network, FC, or USB packet processing; PMC-Sierra/Microchip/ATTO/Adaptec SPCv controllers are local PCI devices in storage servers and workstations.\nAC:L - Once request_irq() fails after any earlier MSI-X vector succeeded, rollback always free_irq()s the failing index i instead of registered index j, then pci_free_irq_vectors() and kfree of the HBA; a local attacker can induce that partial failure with memory or IRQ exhaustion and does not depend on an uncontrolled race.\nPR:L - An unprivileged local user on a machine with a multi-vector SPCv pm8001 HBA can apply memory pressure during probe, deferred probe, or resume so a later request_irq() fails, then spray the heap against the leftover IRQ handler; PCI bind/unbind needs init-namespace root but is not required to exploit the planted UAF.\nUI:N - No victim must mount a filesystem, open a device, or plug hardware; the attacker induces the MSI-X request failure and consumes the leftover handler without another user's action.\nS:U - The leftover irqaction and use-after-free of pm8001_hba_info stay in the host kernel IRQ/SCSI path and do not cross a VM, IOMMU, or other security-authority boundary.\nC:H - Failed MSI-X registration leaves pm8001_interrupt_handler_msix installed with dev_id pointing into pm8001_ha, which pm8001_free() then kfree()s, a use-after-free that per kernel CNA guidance enables arbitrary kernel memory disclosure via slab reuse.\nI:H - The same dangling MSI-X handler reads irq_vector->drv_inst and invokes isr/tasklet on the freed HBA object; reclaiming that heap allocation yields write and control-flow hijack primitives, so integrity impact is High.\nA:H - Wrong-index free_irq() hits WARN on an already-free IRQ, pci_free_irq_vectors() tears down descriptors with live irqactions, and a later IRQ or panic_on_warn can oops or panic the kernel, fully denying availability."
    }
  }
}