SB20260812244 - Use of uninitialized resource in Linux kernel core

Description

This security bulletin contains information about 1 vulnerability.

1) Use of uninitialized resource (CVE-ID: CVE-2026-68288)

CWE-ID: CWE-908 - Use of Uninitialized Resource

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to uninitialized memory exposure in NET_DM_ATTR_PAYLOAD handling in net_dm_packet_report_fill() and net_dm_hw_packet_report_fill() when constructing netlink messages containing packet payload data. A local user can receive a specially crafted netlink message to disclose sensitive information.

The issue occurs when the packet payload length is not 4-byte aligned, causing 1 to 3 padding bytes to remain uninitialized and be leaked to user space.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b
• https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb