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GHSA-4XRX-36PV-43R3

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2026-10-21 15:40

Details

In the Linux kernel, the following vulnerability has been resolved:

PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops

Fix a kernel oops found while testing the stm32_pcie Endpoint driver with handling of PERST# deassertion:

During EP initialization, pci_epf_test_alloc_space() allocates all BARs, which are further freed if epc_set_bar() fails (for instance, due to no free inbound window).

However, when pci_epc_set_bar() fails, the error path:

pci_epc_set_bar() -> pci_epf_free_space()

does not clear the previous assignment to epf_test->reg[bar].

Then, if the host reboots, the PERST# deassertion restarts the BAR allocation sequence with the same allocation failure (no free inbound window), creating a double free situation since epf_test->reg[bar] was deallocated and is still non-NULL.

Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space() invocations are symmetric, and as such, set epf_test->reg[bar] to NULL when memory is freed.

[kwilczynski: commit log]

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38069"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T10:15:40Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops\n\nFix a kernel oops found while testing the stm32_pcie Endpoint driver\nwith handling of PERST# deassertion:\n\nDuring EP initialization, pci_epf_test_alloc_space() allocates all BARs,\nwhich are further freed if epc_set_bar() fails (for instance, due to no\nfree inbound window).\n\nHowever, when pci_epc_set_bar() fails, the error path:\n\n  pci_epc_set_bar() -\u003e\n    pci_epf_free_space()\n\ndoes not clear the previous assignment to epf_test-\u003ereg[bar].\n\nThen, if the host reboots, the PERST# deassertion restarts the BAR\nallocation sequence with the same allocation failure (no free inbound\nwindow), creating a double free situation since epf_test-\u003ereg[bar] was\ndeallocated and is still non-NULL.\n\nThus, make sure that pci_epf_alloc_space() and pci_epf_free_space()\ninvocations are symmetric, and as such, set epf_test-\u003ereg[bar] to NULL\nwhen memory is freed.\n\n[kwilczynski: commit log]",
  "id": "GHSA-4xrx-36pv-43r3",
  "modified": "2026-10-21T15:40:03Z",
  "published": "2025-06-18T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38069"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/761db4ca3a469f2070757acd4e104dff5125ca99"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-38069 (GCVE-0-2025-38069)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-10-21 12:36

Title

PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops Fix a kernel oops found while testing the stm32_pcie Endpoint driver with handling of PERST# deassertion: During EP initialization, pci_epf_test_alloc_space() allocates all BARs, which are further freed if epc_set_bar() fails (for instance, due to no free inbound window). However, when pci_epc_set_bar() fails, the error path: pci_epc_set_bar() -> pci_epf_free_space() does not clear the previous assignment to epf_test->reg[bar]. Then, if the host reboots, the PERST# deassertion restarts the BAR allocation sequence with the same allocation failure (no free inbound window), creating a double free situation since epf_test->reg[bar] was deallocated and is still non-NULL. Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space() invocations are symmetric, and as such, set epf_test->reg[bar] to NULL when memory is freed. [kwilczynski: commit log]

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6843 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/761db4ca3a469f207…
https://git.kernel.org/stable/c/fe2329eff5bee461e…
https://git.kernel.org/stable/c/8b83893d1f6c6061a…
https://git.kernel.org/stable/c/934e9d137d9377060…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 , < 761db4ca3a469f2070757acd4e104dff5125ca99 (git) Affected: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 , < fe2329eff5bee461ebcafadb6ca1df0cbf5945fd (git) Affected: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 , < 8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee (git) Affected: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 , < 934e9d137d937706004c325fa1474f9e3f1ba10a (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.31 , ≤ 6.12.* (semver) Unaffected: 6.14.9 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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": "761db4ca3a469f2070757acd4e104dff5125ca99",
              "status": "affected",
              "version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
              "versionType": "git"
            },
            {
              "lessThan": "fe2329eff5bee461ebcafadb6ca1df0cbf5945fd",
              "status": "affected",
              "version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
              "versionType": "git"
            },
            {
              "lessThan": "8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee",
              "status": "affected",
              "version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
              "versionType": "git"
            },
            {
              "lessThan": "934e9d137d937706004c325fa1474f9e3f1ba10a",
              "status": "affected",
              "version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
              "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": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.12",
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                },
                {
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "4.12",
                  "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: Fix double free that causes kernel to oops\n\nFix a kernel oops found while testing the stm32_pcie Endpoint driver\nwith handling of PERST# deassertion:\n\nDuring EP initialization, pci_epf_test_alloc_space() allocates all BARs,\nwhich are further freed if epc_set_bar() fails (for instance, due to no\nfree inbound window).\n\nHowever, when pci_epc_set_bar() fails, the error path:\n\n  pci_epc_set_bar() -\u003e\n    pci_epf_free_space()\n\ndoes not clear the previous assignment to epf_test-\u003ereg[bar].\n\nThen, if the host reboots, the PERST# deassertion restarts the BAR\nallocation sequence with the same allocation failure (no free inbound\nwindow), creating a double free situation since epf_test-\u003ereg[bar] was\ndeallocated and is still non-NULL.\n\nThus, make sure that pci_epf_alloc_space() and pci_epf_free_space()\ninvocations are symmetric, and as such, set epf_test-\u003ereg[bar] to NULL\nwhen memory is freed.\n\n[kwilczynski: commit log]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:36:43.518Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38069",
    "datePublished": "2025-06-18T09:33:46.711Z",
    "dateReserved": "2025-04-16T04:51:23.980Z",
    "dateUpdated": "2026-10-21T12:36:43.518Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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