CVE-2026-43097 (GCVE-0-2026-43097)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-06 07:40
VLAI?
Title
PCI: hv: Fix double ida_free in hv_pci_probe error path
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: hv: Fix double ida_free in hv_pci_probe error path If hv_pci_probe() fails after storing the domain number in hbus->bridge->domain_nr, there is a call to free this domain_nr via pci_bus_release_emul_domain_nr(), however, during cleanup, the bridge release callback pci_release_host_bridge_dev() also frees the domain_nr causing ida_free to be called on same ID twice and triggering following warning: ida_free called for id=28971 which is not allocated. WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198 Call Trace: pci_bus_release_emul_domain_nr+0x17/0x20 pci_release_host_bridge_dev+0x4b/0x60 device_release+0x3b/0xa0 kobject_put+0x8e/0x220 devm_pci_alloc_host_bridge_release+0xe/0x20 devres_release_all+0x9a/0xd0 device_unbind_cleanup+0x12/0xa0 really_probe+0x1c5/0x3f0 vmbus_add_channel_work+0x135/0x1a0 Fix this by letting pci core handle the free domain_nr and remove the explicit free called in pci-hyperv driver.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bcce8c74f1ce1e2731ac0261287897e3768767d8 , < 21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48 (git)
Affected: bcce8c74f1ce1e2731ac0261287897e3768767d8 , < b6422dff0e518245019233432b6bccfc30b73e2f (git)
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    Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pci-hyperv.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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          ],
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            },
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              "status": "unaffected",
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            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: hv: Fix double ida_free in hv_pci_probe error path\n\nIf hv_pci_probe() fails after storing the domain number in\nhbus-\u003ebridge-\u003edomain_nr, there is a call to free this domain_nr via\npci_bus_release_emul_domain_nr(), however, during cleanup, the bridge\nrelease callback pci_release_host_bridge_dev() also frees the domain_nr\ncausing ida_free to be called on same ID twice and triggering following\nwarning:\n\n  ida_free called for id=28971 which is not allocated.\n  WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198\n  Call Trace:\n   pci_bus_release_emul_domain_nr+0x17/0x20\n   pci_release_host_bridge_dev+0x4b/0x60\n   device_release+0x3b/0xa0\n   kobject_put+0x8e/0x220\n   devm_pci_alloc_host_bridge_release+0xe/0x20\n   devres_release_all+0x9a/0xd0\n   device_unbind_cleanup+0x12/0xa0\n   really_probe+0x1c5/0x3f0\n   vmbus_add_channel_work+0x135/0x1a0\n\nFix this by letting pci core handle the free domain_nr and remove\nthe explicit free called in pci-hyperv driver."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T07:40:28.157Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6422dff0e518245019233432b6bccfc30b73e2f"
        }
      ],
      "title": "PCI: hv: Fix double ida_free in hv_pci_probe error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43097",
    "datePublished": "2026-05-06T07:40:28.157Z",
    "dateReserved": "2026-05-01T14:12:55.984Z",
    "dateUpdated": "2026-05-06T07:40:28.157Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43097",
      "date": "2026-05-07",
      "epss": "0.00018",
      "percentile": "0.05025"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43097\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T10:16:23.137\",\"lastModified\":\"2026-05-06T13:08:07.970\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nPCI: hv: Fix double ida_free in hv_pci_probe error path\\n\\nIf hv_pci_probe() fails after storing the domain number in\\nhbus-\u003ebridge-\u003edomain_nr, there is a call to free this domain_nr via\\npci_bus_release_emul_domain_nr(), however, during cleanup, the bridge\\nrelease callback pci_release_host_bridge_dev() also frees the domain_nr\\ncausing ida_free to be called on same ID twice and triggering following\\nwarning:\\n\\n  ida_free called for id=28971 which is not allocated.\\n  WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198\\n  Call Trace:\\n   pci_bus_release_emul_domain_nr+0x17/0x20\\n   pci_release_host_bridge_dev+0x4b/0x60\\n   device_release+0x3b/0xa0\\n   kobject_put+0x8e/0x220\\n   devm_pci_alloc_host_bridge_release+0xe/0x20\\n   devres_release_all+0x9a/0xd0\\n   device_unbind_cleanup+0x12/0xa0\\n   really_probe+0x1c5/0x3f0\\n   vmbus_add_channel_work+0x135/0x1a0\\n\\nFix this by letting pci core handle the free domain_nr and remove\\nthe explicit free called in pci-hyperv driver.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6422dff0e518245019233432b6bccfc30b73e2f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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