SB2026072181 - Race condition in Linux kernel net team driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-64190)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause a denial of service.

The vulnerability exists due to a race condition leading to a NULL pointer dereference in team_xmit in the Linux kernel team driver when changing team device mode concurrently with transmit activity. A local privileged user can trigger a mode change while traffic is being transmitted on the team device to cause a denial of service.

Exploitation requires the ability to perform a mode change on the team device and concurrent transmit activity.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/03e9405c518c4d61f28079492f252d6d4e2bac5c
• https://git.kernel.org/stable/c/25fe708bbc59289d3d1ea4b126fbc1b460a072a5