CVE-2025-40032 (GCVE-0-2025-40032)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-05-11 21:41
VLAI
Title
PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release The fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be NULL even after EPF initialization. Then it is prudent to check that they have non-NULL values before releasing the channels. Add the checks in pci_epf_test_clean_dma_chan(). Without the checks, NULL pointer dereferences happen and they can lead to a kernel panic in some cases: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050 Call trace: dma_release_channel+0x2c/0x120 (P) pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test] pci_epc_deinit_notify+0x74/0xc0 tegra_pcie_ep_pex_rst_irq+0x250/0x5d8 irq_thread_fn+0x34/0xb8 irq_thread+0x18c/0x2e8 kthread+0x14c/0x210 ret_from_fork+0x10/0x20 [mani: trimmed the stack trace]
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7034 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5ebf3fc59bd20d17df3ba26159787d13cf20d362 , < 6411f840a9b5c47c00ca8e004733de232553870d (git)
Affected: 5ebf3fc59bd20d17df3ba26159787d13cf20d362 , < 0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b (git)
Affected: 5ebf3fc59bd20d17df3ba26159787d13cf20d362 , < fb54ffd60064c4e5139a3eb216e877b1acae1c8b (git)
Affected: 5ebf3fc59bd20d17df3ba26159787d13cf20d362 , < 57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba (git)
Affected: 5ebf3fc59bd20d17df3ba26159787d13cf20d362 , < 85afa9ea122dd9d4a2ead104a951d318975dcd25 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.1.157 , ≤ 6.1.* (semver)
Unaffected: 6.6.113 , ≤ 6.6.* (semver)
Unaffected: 6.12.54 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/endpoint/functions/pci-epf-test.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.157",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release\n\nThe fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be\nNULL even after EPF initialization. Then it is prudent to check that\nthey have non-NULL values before releasing the channels. Add the checks\nin pci_epf_test_clean_dma_chan().\n\nWithout the checks, NULL pointer dereferences happen and they can lead\nto a kernel panic in some cases:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n  Call trace:\n   dma_release_channel+0x2c/0x120 (P)\n   pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]\n   pci_epc_deinit_notify+0x74/0xc0\n   tegra_pcie_ep_pex_rst_irq+0x250/0x5d8\n   irq_thread_fn+0x34/0xb8\n   irq_thread+0x18c/0x2e8\n   kthread+0x14c/0x210\n   ret_from_fork+0x10/0x20\n\n[mani: trimmed the stack trace]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:41:10.040Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b"
        },
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          "url": "https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba"
        },
        {
          "url": "https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25"
        }
      ],
      "title": "PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40032",
    "datePublished": "2025-10-28T11:48:14.876Z",
    "dateReserved": "2025-04-16T07:20:57.153Z",
    "dateUpdated": "2026-05-11T21:41:10.040Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "cve": "CVE-2025-40032",
      "date": "2026-10-28",
      "epss": "0.00216",
      "percentile": "0.11945"
    },
    "microsoft_vex": {
      "current_release_date": "2025-10-29T01:03:26.000Z",
      "cve": "CVE-2025-40032",
      "id": "msrc_CVE-2025-40032",
      "initial_release_date": "2025-10-02T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40032.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "affected": [
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            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/pci/endpoint/functions/pci-epf-test.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
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                    "versionType": "git"
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                    "status": "affected",
                    "version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/pci/endpoint/functions/pci-epf-test.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "version": "5.7"
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                    "version": "0",
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                    "versionType": "semver"
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                    "versionType": "semver"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release\n\nThe fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be\nNULL even after EPF initialization. Then it is prudent to check that\nthey have non-NULL values before releasing the channels. Add the checks\nin pci_epf_test_clean_dma_chan().\n\nWithout the checks, NULL pointer dereferences happen and they can lead\nto a kernel panic in some cases:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n  Call trace:\n   dma_release_channel+0x2c/0x120 (P)\n   pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]\n   pci_epc_deinit_notify+0x74/0xc0\n   tegra_pcie_ep_pex_rst_irq+0x250/0x5d8\n   irq_thread_fn+0x34/0xb8\n   irq_thread+0x18c/0x2e8\n   kthread+0x14c/0x210\n   ret_from_fork+0x10/0x20\n\n[mani: trimmed the stack trace]"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPCI: endpoint: pci-epf-test: A\u00f1adir comprobaci\u00f3n de NULL para canales DMA antes de la liberaci\u00f3n\n\nLos campos dma_chan_tx y dma_chan_rx de la estructura pci_epf_test pueden ser NULL incluso despu\u00e9s de la inicializaci\u00f3n de EPF. Entonces es prudente comprobar que tienen valores no-NULL antes de liberar los canales. A\u00f1adir las comprobaciones en pci_epf_test_clean_dma_chan().\n\nSin las comprobaciones, ocurren desreferencias de puntero NULL y pueden llevar a un p\u00e1nico del kernel en algunos casos:\n\n  Incapaz de manejar desreferencia de puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000050\n  Traza de llamada:\n   dma_release_channel+0x2c/0x120 (P)\n   pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]\n   pci_epc_deinit_notify+0x74/0xc0\n   tegra_pcie_ep_pex_rst_irq+0x250/0x5d8\n   irq_thread_fn+0x34/0xb8\n   irq_thread+0x18c/0x2e8\n   kthread+0x14c/0x210\n   ret_from_fork+0x10/0x20\n\n[mani: se ha recortado la traza de pila]"
          }
        ],
        "id": "CVE-2025-40032",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {},
        "published": "2025-10-28T12:15:37.010",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b"
          },
          {
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:34:08+00:00",
      "cve": "CVE-2025-40032",
      "id": "CVE-2025-40032",
      "initial_release_date": "2025-10-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40032.json",
      "version": "3"
    }
  }
}



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