SB20260928412 - Improper initialization in Linux kernel mm pat

Description

This security bulletin contains information about 1 vulnerability.

1) Improper initialization (CVE-ID: CVE-2026-97525)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to compromise confidentiality, integrity, and availability.

The vulnerability exists due to improper initialization in split page table allocation in __split_large_page() when CPA code splits a large page. A local privileged user can cause CPA code to split a large page to compromise confidentiality, integrity, and availability.

Stale IOTLB entries can remain after affected split page tables are freed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/84e0cd79d57f06b872154eb5d8f610584133f260
• https://git.kernel.org/stable/c/922873cf4fc34124215070a8ad391bf831538bb9
• https://git.kernel.org/stable/c/9e4a3ec3411bb6bb59e3c1f29b75609f1e87aac4