Vulnerability-Lookup

CVE-2026-80753 (GCVE-0-2026-80753)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-03 08:26

Title

ovpn: run deferred work on a module-owned workqueue

Summary

In the Linux kernel, the following vulnerability has been resolved: ovpn: run deferred work on a module-owned workqueue ovpn queues several work items whose callbacks execute module text. These works currently run on the global system workqueues, so module exit has no driver-owned drain point that guarantees the callbacks have fully returned before the module text can be freed. Object references protect the objects used by the callbacks, but they do not prove that a workqueue function has returned. In particular, a worker can drop the final reference that unblocks device teardown while it is still executing ovpn code. Add a module-owned workqueue and queue all ovpn work items on it. During module exit, unregister rtnl and netlink first, flush the workqueue so ordinary ovpn workers finish, run the final RCU barrier, and destroy the workqueue last. This keeps the workqueue available for cleanup work queued from RCU callbacks, while ensuring no ovpn work item can outlive the module text. The per-device delayed keepalive work remains explicitly disabled during netdev teardown (disable_delayed_work_sync in ndo_uninit), since flush_workqueue does not flush delayed work that is still only pending on its timer.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/bbe81f40582d451ac…
https://git.kernel.org/stable/c/e9714db8041763f59…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 11851cbd60ea1e5abbd97619d69845ead99303d6 , < bbe81f40582d451ac849b20707784220f33a23bd (git) Affected: 11851cbd60ea1e5abbd97619d69845ead99303d6 , < e9714db8041763f59dde152c812b96b3de05c6d9 (git)	guessed
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ovpn/main.c",
            "drivers/net/ovpn/ovpnpriv.h",
            "drivers/net/ovpn/peer.c",
            "drivers/net/ovpn/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bbe81f40582d451ac849b20707784220f33a23bd",
              "status": "affected",
              "version": "11851cbd60ea1e5abbd97619d69845ead99303d6",
              "versionType": "git"
            },
            {
              "lessThan": "e9714db8041763f59dde152c812b96b3de05c6d9",
              "status": "affected",
              "version": "11851cbd60ea1e5abbd97619d69845ead99303d6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ovpn/main.c",
            "drivers/net/ovpn/ovpnpriv.h",
            "drivers/net/ovpn/peer.c",
            "drivers/net/ovpn/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: run deferred work on a module-owned workqueue\n\novpn queues several work items whose callbacks execute module text.\nThese works currently run on the global system workqueues, so module\nexit has no driver-owned drain point that guarantees the callbacks have\nfully returned before the module text can be freed.\n\nObject references protect the objects used by the callbacks, but they do\nnot prove that a workqueue function has returned. In particular, a\nworker can drop the final reference that unblocks device teardown while\nit is still executing ovpn code.\n\nAdd a module-owned workqueue and queue all ovpn work items on it. During\nmodule exit, unregister rtnl and netlink first, flush the workqueue so\nordinary ovpn workers finish, run the final RCU barrier, and destroy the\nworkqueue last. This keeps the workqueue available for cleanup work\nqueued from RCU callbacks, while ensuring no ovpn work item can outlive\nthe module text.\n\nThe per-device delayed keepalive work remains explicitly disabled during\nnetdev teardown (disable_delayed_work_sync in ndo_uninit), since\nflush_workqueue does not flush delayed work that is still only pending\non its timer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T08:26:32.564Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bbe81f40582d451ac849b20707784220f33a23bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9714db8041763f59dde152c812b96b3de05c6d9"
        }
      ],
      "title": "ovpn: run deferred work on a module-owned workqueue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80753",
    "datePublished": "2026-09-03T08:26:32.564Z",
    "dateReserved": "2026-08-26T14:34:25.790Z",
    "dateUpdated": "2026-09-03T08:26:32.564Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80753",
      "date": "2026-09-03",
      "epss": "0.00198",
      "percentile": "0.09559"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80753\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-03T13:06:15.010\",\"lastModified\":\"2026-09-03T13:06:15.010\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\novpn: run deferred work on a module-owned workqueue\\n\\novpn queues several work items whose callbacks execute module text.\\nThese works currently run on the global system workqueues, so module\\nexit has no driver-owned drain point that guarantees the callbacks have\\nfully returned before the module text can be freed.\\n\\nObject references protect the objects used by the callbacks, but they do\\nnot prove that a workqueue function has returned. In particular, a\\nworker can drop the final reference that unblocks device teardown while\\nit is still executing ovpn code.\\n\\nAdd a module-owned workqueue and queue all ovpn work items on it. During\\nmodule exit, unregister rtnl and netlink first, flush the workqueue so\\nordinary ovpn workers finish, run the final RCU barrier, and destroy the\\nworkqueue last. This keeps the workqueue available for cleanup work\\nqueued from RCU callbacks, while ensuring no ovpn work item can outlive\\nthe module text.\\n\\nThe per-device delayed keepalive work remains explicitly disabled during\\nnetdev teardown (disable_delayed_work_sync in ndo_uninit), since\\nflush_workqueue does not flush delayed work that is still only pending\\non its timer.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ovpn/main.c\",\"drivers/net/ovpn/ovpnpriv.h\",\"drivers/net/ovpn/peer.c\",\"drivers/net/ovpn/tcp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"11851cbd60ea1e5abbd97619d69845ead99303d6\",\"lessThan\":\"bbe81f40582d451ac849b20707784220f33a23bd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"11851cbd60ea1e5abbd97619d69845ead99303d6\",\"lessThan\":\"e9714db8041763f59dde152c812b96b3de05c6d9\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ovpn/main.c\",\"drivers/net/ovpn/ovpnpriv.h\",\"drivers/net/ovpn/peer.c\",\"drivers/net/ovpn/tcp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/bbe81f40582d451ac849b20707784220f33a23bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9714db8041763f59dde152c812b96b3de05c6d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

FKIE_CVE-2026-80753

Vulnerability from fkie_nvd - Published: 2026-09-03 13:06 - Updated: 2026-09-03 13:06

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bbe81f40582d451ac849b20707784220f33a23bd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e9714db8041763f59dde152c812b96b3de05c6d9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ovpn/main.c",
            "drivers/net/ovpn/ovpnpriv.h",
            "drivers/net/ovpn/peer.c",
            "drivers/net/ovpn/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bbe81f40582d451ac849b20707784220f33a23bd",
              "status": "affected",
              "version": "11851cbd60ea1e5abbd97619d69845ead99303d6",
              "versionType": "git"
            },
            {
              "lessThan": "e9714db8041763f59dde152c812b96b3de05c6d9",
              "status": "affected",
              "version": "11851cbd60ea1e5abbd97619d69845ead99303d6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ovpn/main.c",
            "drivers/net/ovpn/ovpnpriv.h",
            "drivers/net/ovpn/peer.c",
            "drivers/net/ovpn/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: run deferred work on a module-owned workqueue\n\novpn queues several work items whose callbacks execute module text.\nThese works currently run on the global system workqueues, so module\nexit has no driver-owned drain point that guarantees the callbacks have\nfully returned before the module text can be freed.\n\nObject references protect the objects used by the callbacks, but they do\nnot prove that a workqueue function has returned. In particular, a\nworker can drop the final reference that unblocks device teardown while\nit is still executing ovpn code.\n\nAdd a module-owned workqueue and queue all ovpn work items on it. During\nmodule exit, unregister rtnl and netlink first, flush the workqueue so\nordinary ovpn workers finish, run the final RCU barrier, and destroy the\nworkqueue last. This keeps the workqueue available for cleanup work\nqueued from RCU callbacks, while ensuring no ovpn work item can outlive\nthe module text.\n\nThe per-device delayed keepalive work remains explicitly disabled during\nnetdev teardown (disable_delayed_work_sync in ndo_uninit), since\nflush_workqueue does not flush delayed work that is still only pending\non its timer."
    }
  ],
  "id": "CVE-2026-80753",
  "lastModified": "2026-09-03T13:06:15.010",
  "metrics": {},
  "published": "2026-09-03T13:06:15.010",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bbe81f40582d451ac849b20707784220f33a23bd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e9714db8041763f59dde152c812b96b3de05c6d9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-V4XM-Q8J7-Q9WJ

Vulnerability from github – Published: 2026-09-03 15:32 – Updated: 2026-09-03 15:32

Details

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

ovpn: run deferred work on a module-owned workqueue

ovpn queues several work items whose callbacks execute module text. These works currently run on the global system workqueues, so module exit has no driver-owned drain point that guarantees the callbacks have fully returned before the module text can be freed.

Object references protect the objects used by the callbacks, but they do not prove that a workqueue function has returned. In particular, a worker can drop the final reference that unblocks device teardown while it is still executing ovpn code.

Add a module-owned workqueue and queue all ovpn work items on it. During module exit, unregister rtnl and netlink first, flush the workqueue so ordinary ovpn workers finish, run the final RCU barrier, and destroy the workqueue last. This keeps the workqueue available for cleanup work queued from RCU callbacks, while ensuring no ovpn work item can outlive the module text.

The per-device delayed keepalive work remains explicitly disabled during netdev teardown (disable_delayed_work_sync in ndo_uninit), since flush_workqueue does not flush delayed work that is still only pending on its timer.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-80753"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T13:06:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: run deferred work on a module-owned workqueue\n\novpn queues several work items whose callbacks execute module text.\nThese works currently run on the global system workqueues, so module\nexit has no driver-owned drain point that guarantees the callbacks have\nfully returned before the module text can be freed.\n\nObject references protect the objects used by the callbacks, but they do\nnot prove that a workqueue function has returned. In particular, a\nworker can drop the final reference that unblocks device teardown while\nit is still executing ovpn code.\n\nAdd a module-owned workqueue and queue all ovpn work items on it. During\nmodule exit, unregister rtnl and netlink first, flush the workqueue so\nordinary ovpn workers finish, run the final RCU barrier, and destroy the\nworkqueue last. This keeps the workqueue available for cleanup work\nqueued from RCU callbacks, while ensuring no ovpn work item can outlive\nthe module text.\n\nThe per-device delayed keepalive work remains explicitly disabled during\nnetdev teardown (disable_delayed_work_sync in ndo_uninit), since\nflush_workqueue does not flush delayed work that is still only pending\non its timer.",
  "id": "GHSA-v4xm-q8j7-q9wj",
  "modified": "2026-09-03T15:32:16Z",
  "published": "2026-09-03T15:32:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80753"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbe81f40582d451ac849b20707784220f33a23bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9714db8041763f59dde152c812b96b3de05c6d9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-80753 (GCVE-0-2026-80753)

FKIE_CVE-2026-80753

GHSA-V4XM-Q8J7-Q9WJ

Tags

Sightings

Nomenclature