CVE-2025-40032 (GCVE-0-2025-40032)
Vulnerability from cvelistv5
Published
2025-10-28 11:48
Modified
2025-10-28 11:48
Severity ?
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]
References
Impacted products
Vendor Product Version
Linux Linux Version: 5ebf3fc59bd20d17df3ba26159787d13cf20d362
Version: 5ebf3fc59bd20d17df3ba26159787d13cf20d362
Version: 5ebf3fc59bd20d17df3ba26159787d13cf20d362
Version: 5ebf3fc59bd20d17df3ba26159787d13cf20d362
Version: 5ebf3fc59bd20d17df3ba26159787d13cf20d362
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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",
          "versions": [
            {
              "lessThan": "6411f840a9b5c47c00ca8e004733de232553870d",
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              "version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
              "versionType": "git"
            },
            {
              "lessThan": "0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
              "status": "affected",
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              "versionType": "git"
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              "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": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.157",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.113",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.54",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.3",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18-rc1",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                }
              ],
              "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": "2025-10-28T11:48:14.876Z",
        "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"
        },
        {
          "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": "2025-10-28T11:48:14.876Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40032\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-28T12:15:37.010\",\"lastModified\":\"2025-10-30T15:05:32.197\",\"vulnStatus\":\"Awaiting Analysis\",\"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]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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