Home/CVE/In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release
CVE

CVE-2026-31678

In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release

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.

HIGH · CVSS 7.8 EPSS 0.00014
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
▤

Affected Products & Versions

6
linux kernel>= 4.3 and < 6.1.168
linux kernel>= 6.2 and < 6.6.131
linux kernel>= 6.7 and < 6.12.80
linux kernel>= 6.13 and < 6.18.21
linux kernel>= 6.19 and < 6.19.11
linux kernelall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Apr 2026 · 09:16 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
msrcCVE-2026-31678
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896Patch
https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486cPatch
https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eabPatch
https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffcPatch
https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8Patch
https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643Patch
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin