CVE-2026-31594 (GCVE-0-2026-31594)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-24 14:42
VLAI?
Title
PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to perform later. This leads to an oops when .allow_link fails or when .drop_link is performed. The following is an example oops of the former case: Unable to handle kernel paging request at virtual address dead000000000108 [...] [dead000000000108] address between user and kernel address ranges Internal error: Oops: 0000000096000044 [#1] SMP [...] Call trace: pci_epc_remove_epf+0x78/0xe0 (P) pci_primary_epc_epf_link+0x88/0xa8 configfs_symlink+0x1f4/0x5a0 vfs_symlink+0x134/0x1d8 do_symlinkat+0x88/0x138 __arm64_sys_symlinkat+0x74/0xe0 [...] Remove the helper, and drop pci_epc_put(). EPC device refcounting is tied to the configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 478e776101592eb63298714e96823ef78a3295ec (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a7a3cab4d33fd8a8aed864c447d0d7c99e85404e (git)
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    Linux Linux Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)
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{
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/functions/pci-epf-vntb.c"
          ],
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              "versionType": "semver"
            },
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              "cpeMatch": [
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown\n\nepf_ntb_epc_destroy() duplicates the teardown that the caller is\nsupposed to perform later. This leads to an oops when .allow_link fails\nor when .drop_link is performed. The following is an example oops of the\nformer case:\n\n  Unable to handle kernel paging request at virtual address dead000000000108\n  [...]\n  [dead000000000108] address between user and kernel address ranges\n  Internal error: Oops: 0000000096000044 [#1]  SMP\n  [...]\n  Call trace:\n   pci_epc_remove_epf+0x78/0xe0 (P)\n   pci_primary_epc_epf_link+0x88/0xa8\n   configfs_symlink+0x1f4/0x5a0\n   vfs_symlink+0x134/0x1d8\n   do_symlinkat+0x88/0x138\n   __arm64_sys_symlinkat+0x74/0xe0\n  [...]\n\nRemove the helper, and drop pci_epc_put(). EPC device refcounting is\ntied to the configfs EPC group lifetime, and pci_epc_put() in the\n.drop_link path is sufficient."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T14:42:20.556Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a"
        },
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          "url": "https://git.kernel.org/stable/c/478e776101592eb63298714e96823ef78a3295ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7a3cab4d33fd8a8aed864c447d0d7c99e85404e"
        }
      ],
      "title": "PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown",
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        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31594",
    "datePublished": "2026-04-24T14:42:20.556Z",
    "dateReserved": "2026-03-09T15:48:24.121Z",
    "dateUpdated": "2026-04-24T14:42:20.556Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-04-26",
      "epss": "0.00017",
      "percentile": "0.0407"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31594\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-24T15:16:37.087\",\"lastModified\":\"2026-04-24T17:51:40.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nPCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown\\n\\nepf_ntb_epc_destroy() duplicates the teardown that the caller is\\nsupposed to perform later. This leads to an oops when .allow_link fails\\nor when .drop_link is performed. The following is an example oops of the\\nformer case:\\n\\n  Unable to handle kernel paging request at virtual address dead000000000108\\n  [...]\\n  [dead000000000108] address between user and kernel address ranges\\n  Internal error: Oops: 0000000096000044 [#1]  SMP\\n  [...]\\n  Call trace:\\n   pci_epc_remove_epf+0x78/0xe0 (P)\\n   pci_primary_epc_epf_link+0x88/0xa8\\n   configfs_symlink+0x1f4/0x5a0\\n   vfs_symlink+0x134/0x1d8\\n   do_symlinkat+0x88/0x138\\n   __arm64_sys_symlinkat+0x74/0xe0\\n  [...]\\n\\nRemove the helper, and drop pci_epc_put(). EPC device refcounting is\\ntied to the configfs EPC group lifetime, and pci_epc_put() in the\\n.drop_link path is sufficient.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/478e776101592eb63298714e96823ef78a3295ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a7a3cab4d33fd8a8aed864c447d0d7c99e85404e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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