Vulnerability-Lookup

FKIE_CVE-2026-31678

Vulnerability from fkie_nvd - Published: 2026-04-25 09:16 - Updated: 2026-06-17 10:34

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev. Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/vport-netdev.c"
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    }
  ],
  "id": "CVE-2026-31678",
  "lastModified": "2026-06-17T10:34:13.320",
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          "attackVector": "LOCAL",
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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  "published": "2026-04-25T09:16:01.437",
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  "vulnStatus": "Analyzed",
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        {
          "lang": "en",
          "value": "CWE-367"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31678 (GCVE-0-2026-31678)

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-08-05 12:24

Title

openvswitch: defer tunnel netdev_put to RCU release

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root Scorecard

References

6 references

URL	Tags
https://git.kernel.org/stable/c/9d56aced21fb9c104…
https://git.kernel.org/stable/c/42f0d3d81209654c0…
https://git.kernel.org/stable/c/bbe7bd722bfaea36a…
https://git.kernel.org/stable/c/98b726ab5e2a4811e…
https://git.kernel.org/stable/c/b8c56a3fc5d879c09…
https://git.kernel.org/stable/c/6931d21f87bc6d657…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc (git) Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < 42f0d3d81209654c08ffdde5a34b9b92d2645896 (git) Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < bbe7bd722bfaea36aab3da6cc60fb4a05c644643 (git) Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < 98b726ab5e2a4811e27c28e4d041f75bba147eab (git) Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < b8c56a3fc5d879c0928f207a756b0f067f06c6a8 (git) Affected: a9020fde67a6eb77f8130feff633189f99264db1 , < 6931d21f87bc6d657f145798fad0bf077b82486c (git)
Linux	Linux	Affected: 4.3 Unaffected: 0 , < 4.3 (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.131 , ≤ 6.6.* (semver) Unaffected: 6.12.80 , ≤ 6.12.* (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/vport-netdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:24:24.631Z",
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        }
      ],
      "title": "openvswitch: defer tunnel netdev_put to RCU release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31678",
    "datePublished": "2026-04-25T08:46:54.476Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-08-05T12:24:24.631Z",
    "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2026-31678

CVE-2026-31678 (GCVE-0-2026-31678)

Tags

Sightings

Nomenclature

Related by attack behaviour