CVE-2026-31678

high

In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run a…

Vendor / product: Linux — linux kernel

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.

CVSS

7.8

7.8 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Timeline (UTC)

Published: 2026-04-25 09:16

Modified: 2026-10-30 13:18

NVD status: Modified

Last synced 1 day ago

Verified against the source API 2026-10-30 13:38 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥4.3 <6.1.168, ≥6.2 <6.6.131, ≥6.7 <6.12.80, ≥6.13 <6.18.21, ≥6.19 <6.19.11, 7.0

Weakness classification (CWE)

CWE-367 CWE-362

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896

Patch / mitigation: https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c

Patch / mitigation: https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab

Patch / mitigation: https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc

Patch / mitigation: https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8

Patch / mitigation: https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643

References

https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f0ec49d3a39c1f5a4f3270ea27ca0854fad2a2a2 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-10-30 13:38 UTC · record ↗

Learn the basics

Understanding CVEs and CVSS Scores

CVE-2026-31678

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

Learn the basics

Related CVEs