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GHSA-JG3H-CXCF-H3VQ

Vulnerability from github – Published: 2025-10-07 18:31 – Updated: 2026-02-04 00:30

Details

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

octeon_ep: cancel queued works in probe error path

If it fails to get the devices's MAC address, octep_probe exits while leaving the delayed work intr_poll_task queued. When the work later runs, it's a use after free.

Move the cancelation of intr_poll_task from octep_remove into octep_device_cleanup. This does not change anything in the octep_remove flow, but octep_device_cleanup is called also in the octep_probe error path, where the cancelation is needed.

Note that the cancelation of ctrl_mbox_task has to follow intr_poll_task's, because the ctrl_mbox_task may be queued by intr_poll_task.

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-2023-53638"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-07T16:15:47Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteon_ep: cancel queued works in probe error path\n\nIf it fails to get the devices\u0027s MAC address, octep_probe exits while\nleaving the delayed work intr_poll_task queued. When the work later\nruns, it\u0027s a use after free.\n\nMove the cancelation of intr_poll_task from octep_remove into\noctep_device_cleanup. This does not change anything in the octep_remove\nflow, but octep_device_cleanup is called also in the octep_probe error\npath, where the cancelation is needed.\n\nNote that the cancelation of ctrl_mbox_task has to follow\nintr_poll_task\u0027s, because the ctrl_mbox_task may be queued by\nintr_poll_task.",
  "id": "GHSA-jg3h-cxcf-h3vq",
  "modified": "2026-02-04T00:30:27Z",
  "published": "2025-10-07T18:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53638"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62312e2f6466b5f0a120542a38b410d88a34ed00"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/758c91078165ae641b698750a72eafe7968b3756"
    }
  ],
  "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-2023-53638 (GCVE-0-2023-53638)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2026-08-05 09:15

Title

octeon_ep: cancel queued works in probe error path

Summary

In the Linux kernel, the following vulnerability has been resolved: octeon_ep: cancel queued works in probe error path If it fails to get the devices's MAC address, octep_probe exits while leaving the delayed work intr_poll_task queued. When the work later runs, it's a use after free. Move the cancelation of intr_poll_task from octep_remove into octep_device_cleanup. This does not change anything in the octep_remove flow, but octep_device_cleanup is called also in the octep_probe error path, where the cancelation is needed. Note that the cancelation of ctrl_mbox_task has to follow intr_poll_task's, because the ctrl_mbox_task may be queued by intr_poll_task.

Severity

7 (High)


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

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/62312e2f6466b5f0a…
https://git.kernel.org/stable/c/758c91078165ae641…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 24d4333233b378114106a1327d3d635a004f4387 , < 62312e2f6466b5f0a120542a38b410d88a34ed00 (git) Affected: 24d4333233b378114106a1327d3d635a004f4387 , < 758c91078165ae641b698750a72eafe7968b3756 (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.4.12 , ≤ 6.4.* (semver) Unaffected: 6.5 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/octeon_ep/octep_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "62312e2f6466b5f0a120542a38b410d88a34ed00",
              "status": "affected",
              "version": "24d4333233b378114106a1327d3d635a004f4387",
              "versionType": "git"
            },
            {
              "lessThan": "758c91078165ae641b698750a72eafe7968b3756",
              "status": "affected",
              "version": "24d4333233b378114106a1327d3d635a004f4387",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/octeon_ep/octep_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.12",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteon_ep: cancel queued works in probe error path\n\nIf it fails to get the devices\u0027s MAC address, octep_probe exits while\nleaving the delayed work intr_poll_task queued. When the work later\nruns, it\u0027s a use after free.\n\nMove the cancelation of intr_poll_task from octep_remove into\noctep_device_cleanup. This does not change anything in the octep_remove\nflow, but octep_device_cleanup is called also in the octep_probe error\npath, where the cancelation is needed.\n\nNote that the cancelation of ctrl_mbox_task has to follow\nintr_poll_task\u0027s, because the ctrl_mbox_task may be queued by\nintr_poll_task."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is the PCI probe path of the octeon_ep driver, reached via local device enumeration, hotplug, module load, or sysfs bind/unbind on the host. No remote network protocol handling is involved.\nAC:H - Exploitation requires `octep_probe()` to fail after the poll work is queued \u2014 i.e. the Octeon endpoint firmware must fail to answer the MAC-address mailbox request within the 500 ms timeout (or register_netdev must fail), a device/firmware state an attacker on the host cannot reliably force. Turning the resulting UAF into more than an oops additionally requires reclaiming the freed netdev allocation within the ~50 ms work delay.\nPR:L - The UAF fires from a workqueue with no host credentials needed once probe fails, and the probe can be re-triggered through driver bind/unbind; a low-privileged attacker suffices to be present when the freed object is reclaimed, so PR is not raised to High.\nUI:N - The delayed work fires automatically 50 ms after the probe error path frees the device; no victim action is required beyond the normal device probe that happens at boot or hotplug.\nS:U - Both the vulnerable code and the corrupted memory are in the host kernel, so the impact stays within a single security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The work handler reads `oct-\u003epoll_non_ioq_intr` and the `hw_ops` function-pointer table out of freed slab memory; controlling the reclaiming allocation gives an attacker a read primitive over kernel heap contents and leaks kernel state.\nI:H - `queue_delayed_work()` and `queue_work()` write into the freed work/timer structures, and `oct-\u003ehw_ops.poll_non_ioq_interrupts(oct)` is an indirect call through a function pointer read from freed memory \u2014 a direct control-flow hijack primitive once the allocation is sprayed.\nA:H - Even unexploited, the work dereferences freed memory and accesses already-iounmap\u0027ed MMIO, reliably producing a kernel oops/panic (this is the crash the fix was written for)."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:16.890Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/62312e2f6466b5f0a120542a38b410d88a34ed00"
        },
        {
          "url": "https://git.kernel.org/stable/c/758c91078165ae641b698750a72eafe7968b3756"
        }
      ],
      "title": "octeon_ep: cancel queued works in probe error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53638",
    "datePublished": "2025-10-07T15:19:38.989Z",
    "dateReserved": "2025-10-07T15:16:59.658Z",
    "dateUpdated": "2026-08-05T09:15:16.890Z",
    "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.

Detection rules are retrieved from Rulezet.

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-JG3H-CXCF-H3VQ

CVE-2023-53638 (GCVE-0-2023-53638)

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