Vulnerability-Lookup

FKIE_CVE-2024-46750

Vulnerability from fkie_nvd - Published: 2024-09-18 08:15 - Updated: 2026-08-04 11:20

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: Add missing bridge lock to pci_bus_lock() One of the true positives that the cfg_access_lock lockdep effort identified is this sequence: WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: <TASK> ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything *but* the bridge itself. For the same motivation as adding: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock(). [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-265688.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-355557.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

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          "defaultStatus": "unknown",
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          "vendor": "Siemens",
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  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Add missing bridge lock to pci_bus_lock()\n\nOne of the true positives that the cfg_access_lock lockdep effort\nidentified is this sequence:\n\n  WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70\n  RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70\n  Call Trace:\n   \u003cTASK\u003e\n   ? __warn+0x8c/0x190\n   ? pci_bridge_secondary_bus_reset+0x5d/0x70\n   ? report_bug+0x1f8/0x200\n   ? handle_bug+0x3c/0x70\n   ? exc_invalid_op+0x18/0x70\n   ? asm_exc_invalid_op+0x1a/0x20\n   ? pci_bridge_secondary_bus_reset+0x5d/0x70\n   pci_reset_bus+0x1d8/0x270\n   vmd_probe+0x778/0xa10\n   pci_device_probe+0x95/0x120\n\nWhere pci_reset_bus() users are triggering unlocked secondary bus resets.\nIronically pci_bus_reset(), several calls down from pci_reset_bus(), uses\npci_bus_lock() before issuing the reset which locks everything *but* the\nbridge itself.\n\nFor the same motivation as adding:\n\n  bridge = pci_upstream_bridge(dev);\n  if (bridge)\n    pci_dev_lock(bridge);\n\nto pci_reset_function() for the \"bus\" and \"cxl_bus\" reset cases, add\npci_dev_lock() for @bus-\u003eself to pci_bus_lock().\n\n[bhelgaas: squash in recursive locking deadlock fix from Keith Busch:\nhttps://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: Agregar bloqueo de puente faltante a pci_bus_lock() Uno de los verdaderos positivos que identific\u00f3 el esfuerzo de cfg_access_lock lockdep es esta secuencia: ADVERTENCIA: CPU: 14 PID: 1 en drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Rastreo de llamada:  ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Donde los usuarios de pci_reset_bus() est\u00e1n activando reinicios de bus secundario desbloqueados. Ir\u00f3nicamente, pci_bus_reset(), varias llamadas despu\u00e9s de pci_reset_bus(), usa pci_bus_lock() antes de emitir el reinicio que bloquea todo *excepto* el puente mismo. Por la misma motivaci\u00f3n que agregar: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); Para pci_reset_function() en los casos de reinicio de \"bus\" y \"cxl_bus\", agregue pci_dev_lock() para @bus-\u0026gt;self a pci_bus_lock(). [bhelgaas: soluci\u00f3n de bloqueo recursivo de squash de Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]"
    }
  ],
  "id": "CVE-2024-46750",
  "lastModified": "2026-08-04T11:20:21.573",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-46750",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-29T14:47:52.159037Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-09-18T08:15:03.947",
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    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-46750 (GCVE-0-2024-46750)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-08-05 11:38

Title

PCI: Add missing bridge lock to pci_bus_lock()

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-29 14:47 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6633 records in the last 180 days details

References

13 references

URL	Tags
https://git.kernel.org/stable/c/0790b89c7e911003b…
https://git.kernel.org/stable/c/df77a678c33871a6e…
https://git.kernel.org/stable/c/e2355d513b89a2cb5…
https://git.kernel.org/stable/c/04e85a3285b0e5c5a…
https://git.kernel.org/stable/c/7253b4fed46471cc2…
https://git.kernel.org/stable/c/78c6e39fef5c42896…
https://git.kernel.org/stable/c/81c68e218ab883dfa…
https://git.kernel.org/stable/c/a4e772898f8bf2e7e…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2024…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

9 products

Vendor	Product	Version
Linux	Linux	Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < 0790b89c7e911003b8c50ae50e3ac7645de1fae9 (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < df77a678c33871a6e4ac5b54a71662f1d702335b (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < e2355d513b89a2cb511b4ded0deb426cdb01acd0 (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < 04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < 7253b4fed46471cc247c6cacefac890a8472c083 (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < 78c6e39fef5c428960aff742149bba302dd46f5a (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < 81c68e218ab883dfa368460a59b674084c0240da (git) Affected: 090a3c5322e900f468b3205b76d0837003ad57b2 , < a4e772898f8bf2e7e1cf661a12c60a5612c4afab (git)
Linux	Linux	Affected: 3.12 Unaffected: 0 , < 3.12 (semver) Unaffected: 4.19.322 , ≤ 4.19.* (semver) Unaffected: 5.4.284 , ≤ 5.4.* (semver) Unaffected: 5.10.226 , ≤ 5.10.* (semver) Unaffected: 5.15.167 , ≤ 5.15.* (semver) Unaffected: 6.1.110 , ≤ 6.1.* (semver) Unaffected: 6.6.51 , ≤ 6.6.* (semver) Unaffected: 6.10.10 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)
Siemens	RUGGEDCOM RST2428P	Affected: 0 , < V3.2 (custom)
Siemens	SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family	Affected: 0 , < V3.2 (custom)
Siemens	SCALANCE XCM-/XRM-/XCH-/XRH-300 family	Affected: 0 , < V3.2 (custom)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

JSON

To clipboard

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              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Add missing bridge lock to pci_bus_lock()\n\nOne of the true positives that the cfg_access_lock lockdep effort\nidentified is this sequence:\n\n  WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70\n  RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70\n  Call Trace:\n   \u003cTASK\u003e\n   ? __warn+0x8c/0x190\n   ? pci_bridge_secondary_bus_reset+0x5d/0x70\n   ? report_bug+0x1f8/0x200\n   ? handle_bug+0x3c/0x70\n   ? exc_invalid_op+0x18/0x70\n   ? asm_exc_invalid_op+0x1a/0x20\n   ? pci_bridge_secondary_bus_reset+0x5d/0x70\n   pci_reset_bus+0x1d8/0x270\n   vmd_probe+0x778/0xa10\n   pci_device_probe+0x95/0x120\n\nWhere pci_reset_bus() users are triggering unlocked secondary bus resets.\nIronically pci_bus_reset(), several calls down from pci_reset_bus(), uses\npci_bus_lock() before issuing the reset which locks everything *but* the\nbridge itself.\n\nFor the same motivation as adding:\n\n  bridge = pci_upstream_bridge(dev);\n  if (bridge)\n    pci_dev_lock(bridge);\n\nto pci_reset_function() for the \"bus\" and \"cxl_bus\" reset cases, add\npci_dev_lock() for @bus-\u003eself to pci_bus_lock().\n\n[bhelgaas: squash in recursive locking deadlock fix from Keith Busch:\nhttps://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]"
        }
      ],
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            {
              "lang": "en",
              "value": "AV:L - The reset paths are reached only from local interfaces \u2014 the `VFIO_DEVICE_PCI_HOT_RESET` ioctl on an open VFIO device fd, sysfs attributes such as `reset_subordinate`, or driver probe/recovery paths. No remote or adjacent-network data path reaches `pci_bus_lock()`.\nAC:L - The attacker controls both sides of the race: they trigger the bus reset on demand via the VFIO ioctl, and the bridge stays unlocked for the full `msleep(2)` plus up to ~1 s of `pci_bridge_wait_for_secondary_bus()` link polling, so no precise timing or unattainable memory layout is needed.\nPR:L - `VFIO_DEVICE_PCI_HOT_RESET` requires only an open VFIO device fd, which libvirt/QEMU and DPDK deployments routinely hand to an unprivileged user; no root or capability in the init namespace is needed to drive `pci_reset_bus()` repeatedly.\nUI:N - The attacker issues the ioctl (or repeatedly opens/closes the VFIO device) entirely on their own; no victim action is required to reach the unlocked reset.\nS:U - The corruption and any resulting crash stay within the kernel\u0027s own security authority \u2014 there is no guest-to-host escape or IOMMU/DMA boundary crossing, and VFIO already requires all bus-affected devices to be in the caller\u0027s device set.\nC:H - The bridge\u0027s `device_lock` is not held across the sleeping reset, so driver unbind/remove and PM transitions on the bridge run unsynchronized against an in-flight reset that keeps dereferencing `bus-\u003eself` and its port-service state, giving a use-after-free class read primitive over freed kernel objects.\nI:H - Without `pci_cfg_access_lock()` on the bridge, concurrent config writes and a parallel `pci_dev_save_and_disable()`/`pci_dev_restore()` on the same bridge interleave with the `PCI_BRIDGE_CONTROL` read-modify-write, corrupting bridge state (bus numbers, MMIO windows, COMMAND, control bits); the same missing `device_lock` makes the driver-model race exploitable for kernel memory corruption.\nA:H - A lost update can leave `PCI_BRIDGE_CTL_BUS_RESET` asserted, permanently removing every device behind the bridge (potentially the root storage or network controller), and the unlocked unbind/remove-versus-reset race produces oopses and hangs; the reset is repeatable at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:38:20.290Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0"
        },
        {
          "url": "https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945"
        },
        {
          "url": "https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083"
        },
        {
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        },
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          "url": "https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab"
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      "title": "PCI: Add missing bridge lock to pci_bus_lock()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46750",
    "datePublished": "2024-09-18T07:12:10.484Z",
    "dateReserved": "2024-09-11T15:12:18.267Z",
    "dateUpdated": "2026-08-05T11:38:20.290Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2024-46750

CVE-2024-46750 (GCVE-0-2024-46750)

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