SB20260812159 - Out-of-bounds read in Linux kernel gadget function driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-68368)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.1 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in ncm_unwrap_ntb() in the USB gadget NCM function when parsing host-supplied NTBs. A remote attacker can supply a crafted NTB with invalid block lengths, datagram offsets, or datagram lengths to disclose sensitive information.

Exploitation requires a malicious USB host interacting with a system using the affected USB gadget functionality.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1febec7e47cdcd01f43fb0211094e3010474666e
• https://git.kernel.org/stable/c/40c706a0224bde194667e3378c689b542fec4b44
• https://git.kernel.org/stable/c/41fd5f2fb0027d3773ae949e3247c2e0a2a7fe5c
• https://git.kernel.org/stable/c/e07751d0527ccc2a1c32eb0b0b7da3b4b9b5381f
• https://git.kernel.org/stable/c/fff1059d139ef798bab917990524faaf25854ca8