{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43344",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43344"
  ],
  "published": "2026-05-08T13:39:42Z",
  "summary": "perf/x86/intel/uncore: Fix die ID init and look up bugs",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel/uncore: Fix die ID init and look up bugs\n\nIn snbep_pci2phy_map_init(), in the nr_node_ids > 8 path,\nuncore_device_to_die() may return -1 when all CPUs associated\nwith the UBOX device are offline.\n\nRemove the WARN_ON_ONCE(die_id == -1) check for two reasons:\n\n- The current code breaks out of the loop. This is incorrect because\n  pci_get_device() does not guarantee iteration in domain or bus order,\n  so additional UBOX devices may be skipped during the scan.\n\n- Returning -EINVAL is incorrect, since marking offline buses with\n  die_id == -1 is expected and should not be treated as an error.\n\nSeparately, when NUMA is disabled on a NUMA-capable platform,\npcibus_to_node() returns NUMA_NO_NODE, causing uncore_device_to_die()\nto return -1 for all PCI devices.  As a result,\nspr_update_device_location(), used on Intel SPR and EMR, ignores the\ncorresponding PMON units and does not add them to the RB tree.\n\nFix this by using uncore_pcibus_to_dieid(), which retrieves topology\nfrom the UBOX GIDNIDMAP register and works regardless of whether NUMA\nis enabled in Linux.  This requires snbep_pci2phy_map_init() to be\nadded in spr_uncore_pci_init().\n\nKeep uncore_device_to_die() only for the nr_node_ids > 8 case, where\nNUMA is expected to be enabled.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43344"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/184870af0e73f8ea2577c751fa098681465249f2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bdb35811ff41a1678620a407056b6372f350028a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c79ef3342632e71ac8612a2a1cc17ac84dd258b4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6a5dc3ee97581da2907fc7acd62853f07184de67"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a16d1ec4dd0cdcf689f324adde6067083bce9099"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
  }
}