SB20260812384 - Use-after-free in Linux kernel net driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-68152)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to use-after-free in the AMT delayed work handling in drivers/net/amt.c when processing queued delayed work during device removal. A local user can trigger a race condition involving AMT device shutdown to cause a denial of service or execute arbitrary code.

The issue occurs because delayed work items can be re-queued from event_wq after cancellation and then access a freed amt_dev structure after the netdev has been released.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/006340cf06881b6ff49767d8b6f3c4f7b892670c
• https://git.kernel.org/stable/c/1a644db2cf59f164cdf3c75995bab5aadc097528
• https://git.kernel.org/stable/c/a46bfa01e01df0f6f6dc4b0be18db002d6d2dbd2
• https://git.kernel.org/stable/c/ea20c44935d6142daecfa9b39d635033a7553e1b