SB2026060422 - Out-of-bounds read in Linux kernel resource dcn351 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-46263)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to an out-of-bounds read in the AMD display stream encoder creation functions when handling a crafted engine identifier. A local user can supply an invalid eng_id value to trigger an out-of-bounds array access and cause a denial of service.

The issue affects multiple DCN resource implementations, including dcn315, dcn316, dcn32, dcn321, dcn35, and dcn351.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/263e28add4f4472cfa95150d218955d1945aa413
• https://git.kernel.org/stable/c/29f3824b08a98d41ecbbfd33580630d7607f962e
• https://git.kernel.org/stable/c/abde491143e4e12eecc41337910aace4e8d59603
• https://git.kernel.org/stable/c/ca3808d560ad946ab6d089fd1f5bee04b952ead4