Vulnerability-Lookup

FKIE_CVE-2026-31678

Vulnerability from fkie_nvd - Published: 2026-04-25 09:16 - Updated: 2026-05-06 21:28

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

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    }
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  "id": "CVE-2026-31678",
  "lastModified": "2026-05-06T21:28:02.227",
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          "baseSeverity": "HIGH",
          "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": "nvd@nist.gov",
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  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-04-27 14:04

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

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

Vendor

Product

Version

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

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

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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.

Action not permitted

FKIE_CVE-2026-31678

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

Tags

Sightings

Nomenclature