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FKIE_CVE-2024-26738

Vulnerability from fkie_nvd - Published: 2024-04-03 17:15 - Updated: 2026-06-17 07:18
Severity
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: powerpc/pseries/iommu: DLPAR add doesn't completely initialize pci_controller When a PCI device is dynamically added, the kernel oopses with a NULL pointer dereference: BUG: Kernel NULL pointer dereference on read at 0x00000030 Faulting instruction address: 0xc0000000006bbe5c Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: rpadlpar_io rpaphp rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs xsk_diag bonding nft_compat nf_tables nfnetlink rfkill binfmt_misc dm_multipath rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_umad ib_iser libiscsi scsi_transport_iscsi ib_ipoib rdma_cm iw_cm ib_cm mlx5_ib ib_uverbs ib_core pseries_rng drm drm_panel_orientation_quirks xfs libcrc32c mlx5_core mlxfw sd_mod t10_pi sg tls ibmvscsi ibmveth scsi_transport_srp vmx_crypto pseries_wdt psample dm_mirror dm_region_hash dm_log dm_mod fuse CPU: 17 PID: 2685 Comm: drmgr Not tainted 6.7.0-203405+ #66 Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_008) hv:phyp pSeries NIP: c0000000006bbe5c LR: c000000000a13e68 CTR: c0000000000579f8 REGS: c00000009924f240 TRAP: 0300 Not tainted (6.7.0-203405+) MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 24002220 XER: 20040006 CFAR: c000000000a13e64 DAR: 0000000000000030 DSISR: 40000000 IRQMASK: 0 ... NIP sysfs_add_link_to_group+0x34/0x94 LR iommu_device_link+0x5c/0x118 Call Trace: iommu_init_device+0x26c/0x318 (unreliable) iommu_device_link+0x5c/0x118 iommu_init_device+0xa8/0x318 iommu_probe_device+0xc0/0x134 iommu_bus_notifier+0x44/0x104 notifier_call_chain+0xb8/0x19c blocking_notifier_call_chain+0x64/0x98 bus_notify+0x50/0x7c device_add+0x640/0x918 pci_device_add+0x23c/0x298 of_create_pci_dev+0x400/0x884 of_scan_pci_dev+0x124/0x1b0 __of_scan_bus+0x78/0x18c pcibios_scan_phb+0x2a4/0x3b0 init_phb_dynamic+0xb8/0x110 dlpar_add_slot+0x170/0x3b8 [rpadlpar_io] add_slot_store.part.0+0xb4/0x130 [rpadlpar_io] kobj_attr_store+0x2c/0x48 sysfs_kf_write+0x64/0x78 kernfs_fop_write_iter+0x1b0/0x290 vfs_write+0x350/0x4a0 ksys_write+0x84/0x140 system_call_exception+0x124/0x330 system_call_vectored_common+0x15c/0x2ec Commit a940904443e4 ("powerpc/iommu: Add iommu_ops to report capabilities and allow blocking domains") broke DLPAR add of PCI devices. The above added iommu_device structure to pci_controller. During system boot, PCI devices are discovered and this newly added iommu_device structure is initialized by a call to iommu_device_register(). During DLPAR add of a PCI device, a new pci_controller structure is allocated but there are no calls made to iommu_device_register() interface. Fix is to register the iommu device during DLPAR add as well.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46e36ebd5e00a148b67ed77c1d31675996f77c25Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5c57fd2e9bd1c8ea8613a8f94fd0be5eccbf321Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8315b2e25b4e68e42fcb74630f824b9a5067765Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/46e36ebd5e00a148b67ed77c1d31675996f77c25Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a5c57fd2e9bd1c8ea8613a8f94fd0be5eccbf321Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b8315b2e25b4e68e42fcb74630f824b9a5067765Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/ppc-pci.h",
            "arch/powerpc/kernel/iommu.c",
            "arch/powerpc/platforms/pseries/pci_dlpar.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b8315b2e25b4e68e42fcb74630f824b9a5067765",
              "status": "affected",
              "version": "a940904443e432623579245babe63e2486ff327b",
              "versionType": "git"
            },
            {
              "lessThan": "46e36ebd5e00a148b67ed77c1d31675996f77c25",
              "status": "affected",
              "version": "a940904443e432623579245babe63e2486ff327b",
              "versionType": "git"
            },
            {
              "lessThan": "a5c57fd2e9bd1c8ea8613a8f94fd0be5eccbf321",
              "status": "affected",
              "version": "a940904443e432623579245babe63e2486ff327b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/ppc-pci.h",
            "arch/powerpc/kernel/iommu.c",
            "arch/powerpc/platforms/pseries/pci_dlpar.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "42342D9F-A537-444E-8441-E8C6CAD53884",
              "versionEndExcluding": "6.6.19",
              "versionStartIncluding": "6.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "575EE16B-67F2-4B5B-B5F8-1877715C898B",
              "versionEndExcluding": "6.7.7",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F02056A5-B362-4370-9FF8-6F0BD384D520",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "62075ACE-B2A0-4B16-829D-B3DA5AE5CC41",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "A780F817-2A77-4130-A9B7-5C25606314E3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries/iommu: DLPAR add doesn\u0027t completely initialize pci_controller\n\nWhen a PCI device is dynamically added, the kernel oopses with a NULL\npointer dereference:\n\n  BUG: Kernel NULL pointer dereference on read at 0x00000030\n  Faulting instruction address: 0xc0000000006bbe5c\n  Oops: Kernel access of bad area, sig: 11 [#1]\n  LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries\n  Modules linked in: rpadlpar_io rpaphp rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs xsk_diag bonding nft_compat nf_tables nfnetlink rfkill binfmt_misc dm_multipath rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_umad ib_iser libiscsi scsi_transport_iscsi ib_ipoib rdma_cm iw_cm ib_cm mlx5_ib ib_uverbs ib_core pseries_rng drm drm_panel_orientation_quirks xfs libcrc32c mlx5_core mlxfw sd_mod t10_pi sg tls ibmvscsi ibmveth scsi_transport_srp vmx_crypto pseries_wdt psample dm_mirror dm_region_hash dm_log dm_mod fuse\n  CPU: 17 PID: 2685 Comm: drmgr Not tainted 6.7.0-203405+ #66\n  Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_008) hv:phyp pSeries\n  NIP:  c0000000006bbe5c LR: c000000000a13e68 CTR: c0000000000579f8\n  REGS: c00000009924f240 TRAP: 0300   Not tainted  (6.7.0-203405+)\n  MSR:  8000000000009033 \u003cSF,EE,ME,IR,DR,RI,LE\u003e  CR: 24002220  XER: 20040006\n  CFAR: c000000000a13e64 DAR: 0000000000000030 DSISR: 40000000 IRQMASK: 0\n  ...\n  NIP sysfs_add_link_to_group+0x34/0x94\n  LR  iommu_device_link+0x5c/0x118\n  Call Trace:\n   iommu_init_device+0x26c/0x318 (unreliable)\n   iommu_device_link+0x5c/0x118\n   iommu_init_device+0xa8/0x318\n   iommu_probe_device+0xc0/0x134\n   iommu_bus_notifier+0x44/0x104\n   notifier_call_chain+0xb8/0x19c\n   blocking_notifier_call_chain+0x64/0x98\n   bus_notify+0x50/0x7c\n   device_add+0x640/0x918\n   pci_device_add+0x23c/0x298\n   of_create_pci_dev+0x400/0x884\n   of_scan_pci_dev+0x124/0x1b0\n   __of_scan_bus+0x78/0x18c\n   pcibios_scan_phb+0x2a4/0x3b0\n   init_phb_dynamic+0xb8/0x110\n   dlpar_add_slot+0x170/0x3b8 [rpadlpar_io]\n   add_slot_store.part.0+0xb4/0x130 [rpadlpar_io]\n   kobj_attr_store+0x2c/0x48\n   sysfs_kf_write+0x64/0x78\n   kernfs_fop_write_iter+0x1b0/0x290\n   vfs_write+0x350/0x4a0\n   ksys_write+0x84/0x140\n   system_call_exception+0x124/0x330\n   system_call_vectored_common+0x15c/0x2ec\n\nCommit a940904443e4 (\"powerpc/iommu: Add iommu_ops to report capabilities\nand allow blocking domains\") broke DLPAR add of PCI devices.\n\nThe above added iommu_device structure to pci_controller. During\nsystem boot, PCI devices are discovered and this newly added iommu_device\nstructure is initialized by a call to iommu_device_register().\n\nDuring DLPAR add of a PCI device, a new pci_controller structure is\nallocated but there are no calls made to iommu_device_register()\ninterface.\n\nFix is to register the iommu device during DLPAR add as well."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries/iommu: la adici\u00f3n de DLPAR no inicializa completamente pci_controller Cuando se agrega din\u00e1micamente un dispositivo PCI, el kernel falla con una desreferencia del puntero NULL: ERROR: desreferencia del puntero NULL del kernel activado le\u00eddo en 0x00000030 Direcci\u00f3n de instrucci\u00f3n err\u00f3nea: 0xc0000000006bbe5c Vaya: acceso al kernel del \u00e1rea defectuosa, firma: 11 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 M\u00f3dulos NUMA pSeries vinculados en: rpadlpar_io rpaphp rpcsec_gss_krb5 auth_r pcgss nfsv4 dns_resolver nfs lockd gracia fscache netfs xsk_diag vinculaci\u00f3n nft_compat nf_tables nfnetlink rfkill binfmt_misc dm_multipath rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_umad ib_iser libiscsi scsi_transport_iscsi ib_ipoib rdma_cm iw_cm ib_cm mlx5 _ib ib_uverbs ib_core pseries_rng drm drm_panel_orientation_quirks xfs libcrc32c mlx5_core mlxfw sd_mod t10_pi sg tls ibmvscsi ibmveth scsi_transport_srp vmx_crypto pseries_wdt psample dm_mirror dm_region_hash dm_log dm_mod CPU fusible : 17 PID: 2685 Comm: drmgr No contaminado 6.7.0-203405+ #66 Nombre de hardware: IBM,9080-HEX POWER10 (sin procesar) 0x800200 0xf000006 de:IBM,FW1060.00 (NH1060_008) hv:phyp pSeries NIP: c0000000006b be5c LR : c000000000a13e68 CTR: c0000000000579f8 REGS: c00000009924f240 TRAP: 0300 No contaminado (6.7.0-203405+) MSR: 8000000000009033  CR: 2400 2220 XER: 20040006 CFAR: c000000000a13e64 DAR: 0000000000000030 DSISR: 40000000 IRQMASK: 0 ... NIP sysfs_add_link_to_group+0x34/0x94 LR iommu_device_link+0x5c/0x118 Seguimiento de llamadas: iommu_init_device+0x26c/0x318 (no confiable) iommu_device_ enlace+0x5c/0x118 iommu_init_device+0xa8/0x318 iommu_probe_device+0xc0/0x134 iommu_bus_notifier+ 0x44/0x104 notifier_call_chain+0xb8/0x19c blocking_notifier_call_chain+0x64/0x98 bus_notify+0x50/0x7c device_add+0x640/0x918 pci_device_add+0x23c/0x298 of_create_pci_dev+0x400/0x884 of_s can_pci_dev+0x124/0x1b0 __of_scan_bus+0x78/0x18c pcibios_scan_phb+0x2a4/0x3b0 init_phb_dynamic+ 0xb8/0x110 dlpar_add_slot+0x170/0x3b8 [rpadlpar_io] add_slot_store.part.0+0xb4/0x130 [rpadlpar_io] kobj_attr_store+0x2c/0x48 sysfs_kf_write+0x64/0x78 kernfs_fop_write_iter+0x1b 0/0x290 vfs_write+0x350/0x4a0 ksys_write+0x84/0x140 system_call_exception+ 0x124/0x330 system_call_vectored_common+0x15c/0x2ec el commit a940904443e4 (\"powerpc/iommu: agregue iommu_ops para informar capacidades y permitir dominios de bloqueo\") rompi\u00f3 la adici\u00f3n DLPAR de dispositivos PCI. Lo anterior agreg\u00f3 la estructura iommu_device a pci_controller. Durante el arranque del SYSTEM, se descubren dispositivos PCI y esta estructura iommu_device reci\u00e9n agregada se inicializa mediante una llamada a iommu_device_register(). Durante la adici\u00f3n DLPAR de un dispositivo PCI, se asigna una nueva estructura pci_controller pero no se realizan llamadas a la interfaz iommu_device_register(). La soluci\u00f3n es registrar tambi\u00e9n el dispositivo iommu durante la adici\u00f3n de DLPAR."
    }
  ],
  "id": "CVE-2024-26738",
  "lastModified": "2026-06-17T07:18:13.070",
  "metrics": {
    "cvssMetricV31": [
      {
        "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-2024-26738",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-04-03T18:32:38.410311Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-04-03T17:15:51.303",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/46e36ebd5e00a148b67ed77c1d31675996f77c25"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a5c57fd2e9bd1c8ea8613a8f94fd0be5eccbf321"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b8315b2e25b4e68e42fcb74630f824b9a5067765"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/46e36ebd5e00a148b67ed77c1d31675996f77c25"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a5c57fd2e9bd1c8ea8613a8f94fd0be5eccbf321"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b8315b2e25b4e68e42fcb74630f824b9a5067765"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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