Vulnerability-Lookup

GHSA-FF8H-HP46-6356

Vulnerability from github – Published: 2025-01-11 15:30 – Updated: 2025-10-16 18:30

Details

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

net: renesas: rswitch: avoid use-after-put for a device tree node

The device tree node saved in the rswitch_device structure is used at several driver locations. So passing this node to of_node_put() after the first use is wrong.

Move of_node_put() for this node to exit paths.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-55639"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-11T13:15:27Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: renesas: rswitch: avoid use-after-put for a device tree node\n\nThe device tree node saved in the rswitch_device structure is used at\nseveral driver locations. So passing this node to of_node_put() after\nthe first use is wrong.\n\nMove of_node_put() for this node to exit paths.",
  "id": "GHSA-ff8h-hp46-6356",
  "modified": "2025-10-16T18:30:21Z",
  "published": "2025-01-11T15:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-55639"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66b7e9f85b8459c823b11e9af69dbf4be5eb6be8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92007a28f95413058a7268dc84e5f44b700165d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf8c6755f02029d1eddc3ff19b870240f054afc7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-55639 (GCVE-0-2024-55639)

Vulnerability from cvelistv5 – Published: 2025-01-11 12:29 – Updated: 2026-08-05 11:44

Title

net: renesas: rswitch: avoid use-after-put for a device tree node

Summary

In the Linux kernel, the following vulnerability has been resolved: net: renesas: rswitch: avoid use-after-put for a device tree node The device tree node saved in the rswitch_device structure is used at several driver locations. So passing this node to of_node_put() after the first use is wrong. Move of_node_put() for this node to exit paths.

Severity

8.4 (High)


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

Assigner

Linux mitre root Scorecard

References

3 references

URL	Tags
https://git.kernel.org/stable/c/bf8c6755f02029d1e…
https://git.kernel.org/stable/c/92007a28f95413058…
https://git.kernel.org/stable/c/66b7e9f85b8459c82…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < bf8c6755f02029d1eddc3ff19b870240f054afc7 (git) Affected: b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < 92007a28f95413058a7268dc84e5f44b700165d1 (git) Affected: b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < 66b7e9f85b8459c823b11e9af69dbf4be5eb6be8 (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.67 , ≤ 6.6.* (semver) Unaffected: 6.12.6 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/rswitch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bf8c6755f02029d1eddc3ff19b870240f054afc7",
              "status": "affected",
              "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6",
              "versionType": "git"
            },
            {
              "lessThan": "92007a28f95413058a7268dc84e5f44b700165d1",
              "status": "affected",
              "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6",
              "versionType": "git"
            },
            {
              "lessThan": "66b7e9f85b8459c823b11e9af69dbf4be5eb6be8",
              "status": "affected",
              "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/renesas/rswitch.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.67",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.67",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.6",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: renesas: rswitch: avoid use-after-put for a device tree node\n\nThe device tree node saved in the rswitch_device structure is used at\nseveral driver locations. So passing this node to of_node_put() after\nthe first use is wrong.\n\nMove of_node_put() for this node to exit paths."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The affected code is entirely in the rswitch platform driver\u0027s probe/init path (`rswitch_probe()` \u2192 `rswitch_init()` \u2192 `rswitch_device_alloc()`/`rswitch_ether_port_init_all()`), reached through local device/driver lifecycle events such as module load, sysfs bind, or device-tree overlay attach \u2014 never from network traffic.\nAC:L - The premature `of_node_put()` executes unconditionally on every probe, so the dangling reference is created deterministically with no race to win and no memory-layout precondition; an attacker able to drive overlay attach/detach or driver rebind controls both the probe and the node teardown.\nPR:N - The vulnerable sequence runs automatically during driver probe at boot or on device-tree overlay/hotplug attach, requiring no authenticated account or credential for the dangling-reference window to be created, consistent with how comparable probe-path OF-node use-after-free issues are scored.\nUI:N - Probe and port initialization happen autonomously as part of device enumeration; no victim must open a file, mount anything, or take any other action.\nS:U - The freed `struct device_node` and all consequences of dereferencing it remain within the kernel\u0027s own security authority, with no crossing into a hypervisor, IOMMU, or other separate security scope.\nC:H - Use-after-free on a device-tree node lets reclaimed heap contents be interpreted as `struct device_node`/property lists by `of_get_phy_mode()`, `of_property_read_u32()`, and `of_parse_phandle()`, yielding attacker-directed pointer dereferences and disclosure of arbitrary kernel memory.\nI:H - The same UAF gives control over a freed object that is subsequently walked and passed to `devm_of_phy_get()` and phandle resolution, so heap spraying the reclaimed allocation provides write/control-flow-hijack primitives; the refcount imbalance additionally corrupts kobject state.\nA:H - Dereferencing the released node reliably produces a kernel oops or panic, and on static base-tree nodes the imbalance triggers the `refcount_t: underflow; use-after-free` path in `of_node_release()`, leaving the network device unusable on an automotive/embedded gateway SoC."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:44:52.040Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bf8c6755f02029d1eddc3ff19b870240f054afc7"
        },
        {
          "url": "https://git.kernel.org/stable/c/92007a28f95413058a7268dc84e5f44b700165d1"
        },
        {
          "url": "https://git.kernel.org/stable/c/66b7e9f85b8459c823b11e9af69dbf4be5eb6be8"
        }
      ],
      "title": "net: renesas: rswitch: avoid use-after-put for a device tree node",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-55639",
    "datePublished": "2025-01-11T12:29:55.309Z",
    "dateReserved": "2025-01-09T09:51:32.415Z",
    "dateUpdated": "2026-08-05T11:44:52.040Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-FF8H-HP46-6356

CVE-2024-55639 (GCVE-0-2024-55639)

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