{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43344",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.003Z",
        "datePublished": "2026-05-08T13:39:30.537Z",
        "dateUpdated": "2026-09-14T11:58:20.422Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-09-14T11:58:20.422Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/intel/uncore.c",
                        "arch/x86/events/intel/uncore_snbep.c"
                    ],
                    "versions": [
                        {
                            "version": "9a7832ce3d920426a36cdd78eda4b3568d4d09e3",
                            "lessThan": "184870af0e73f8ea2577c751fa098681465249f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9a7832ce3d920426a36cdd78eda4b3568d4d09e3",
                            "lessThan": "bdb35811ff41a1678620a407056b6372f350028a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9a7832ce3d920426a36cdd78eda4b3568d4d09e3",
                            "lessThan": "c79ef3342632e71ac8612a2a1cc17ac84dd258b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9a7832ce3d920426a36cdd78eda4b3568d4d09e3",
                            "lessThan": "6a5dc3ee97581da2907fc7acd62853f07184de67",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9a7832ce3d920426a36cdd78eda4b3568d4d09e3",
                            "lessThan": "a16d1ec4dd0cdcf689f324adde6067083bce9099",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/intel/uncore.c",
                        "arch/x86/events/intel/uncore_snbep.c"
                    ],
                    "versions": [
                        {
                            "version": "5.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.109",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.12.109"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.18.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "6.19.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/184870af0e73f8ea2577c751fa098681465249f2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bdb35811ff41a1678620a407056b6372f350028a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c79ef3342632e71ac8612a2a1cc17ac84dd258b4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6a5dc3ee97581da2907fc7acd62853f07184de67"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a16d1ec4dd0cdcf689f324adde6067083bce9099"
                }
            ],
            "title": "perf/x86/intel/uncore: Fix die ID init and look up bugs",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}