powerpc/pseries/iommu: IOMMU table is not initialized for kdump over SR-IOV

{
  "id": "2b82d4cd0f75f79e4e876bc1e2bbd9a831f29fc658335f9b58c5d81ebeabe45e",
  "url": "https://osv.dev/vulnerability/CVE-2024-26745",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "powerpc/pseries/iommu: IOMMU table is not initialized for kdump over SR-IOV",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries/iommu: IOMMU table is not initialized for kdump over SR-IOV When kdump kernel tries to copy dump data over SR-IOV, LPAR panics due to NULL pointer exception: Kernel attempted to read user page (0) - exploit attempt? (uid: 0) BUG: Kernel NULL pointer dereference on read at 0x00000000 Faulting instruction address: 0xc000000020847ad4 Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: mlx5_core(+) vmx_crypto pseries_wdt papr_scm libnvdimm mlxfw tls psample sunrpc fuse overlay squashfs loop CPU: 12 PID: 315 Comm: systemd-udevd Not tainted 6.4.0-Test102+ #12 Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_008) hv:phyp pSeries NIP: c000000020847ad4 LR: c00000002083b2dc CTR: 00000000006cd18c REGS: c000000029162ca0 TRAP: 0300 Not tainted (6.4.0-Test102+) MSR: 800000000280b033 CR: 48288244 XER: 00000008 CFAR: c00000002083b2d8 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 1 ... NIP _find_next_zero_bit+0x24/0x110 LR bitmap_find_next_zero_area_off+0x5c/0xe0 Call Trace: dev_printk_emit+0x38/0x48 (unreliable) iommu_area_alloc+0xc4/0x180 iommu_range_alloc+0x1e8/0x580 iommu_alloc+0x60/0x130 iommu_alloc_coherent+0x158/0x2b0 dma_iommu_alloc_coherent+0x3c/0x50 dma_alloc_attrs+0x170/0x1f0 mlx5_cmd_init+0xc0/0x760 [mlx5_core] mlx5_function_setup+0xf0/0x510 [mlx5_core] mlx5_init_one+0x84/0x210 [mlx5_core] pr",
    "evidence": "osv:CVE-2024-26745",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.81",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.21",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-26745",
      "aliases": [
        "CVE-2024-26745"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "7eb95e0af5c9c2e6fad50356eaf32d216d0e7bc3"
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                {
                  "fixed": "d4d1e4b1513d975961de7bb4f75e450a92d65ebf"
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                  "fixed": "09a3c1e46142199adcee372a420b024b4fc61051"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.18.18"
                },
                {
                  "fixed": "5.19"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.19.2"
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          "versions": [
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            "v5.18.18",
            "v5.19.17",
            "v5.19.16",
            "v5.19.15",
            "v5.19.14",
            "v5.19.13",
            "v5.19.12",
            "v5.19.11",
            "v5.19.10",
            "v5.19.9",
            "v5.19.8",
            "v5.19.7",
            "v5.19.6",
            "v5.19.5",
            "v5.19.4",
            "v5.19.3",
            "v5.19.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26745.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.0.0"
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              ]
            },
            {
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                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.21"
                }
              ]
            },
            {
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                  "introduced": "6.7.0"
                },
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                  "fixed": "6.7.9"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26745.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.108499490Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/09a3c1e46142199adcee372a420b024b4fc61051",
        "https://git.kernel.org/stable/c/5da6d306f315344af1ca2eff4bd9b10b130f0c28",
        "https://git.kernel.org/stable/c/7eb95e0af5c9c2e6fad50356eaf32d216d0e7bc3",
        "https://git.kernel.org/stable/c/d4d1e4b1513d975961de7bb4f75e450a92d65ebf",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26745.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26745",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26745.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26745",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492206,
  "published_at": "2024-04-04T08:20:13.182+00:00"
}