Integer overflow in Linux kernel - CVE-2026-93227
Published: September 25, 2026
Vulnerability identifier: #VU152166
CSH Severity: Low
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93227
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper handling of an out-of-range page frame number in deferred_grow_zone() when initializing deferred struct pages during boot. A local privileged user can boot the system with a large CMA reservation to cause a denial of service.
The issue requires CONFIG_DEFERRED_STRUCT_PAGE_INIT and CONFIG_CMA, a node RAM end not aligned to PAGES_PER_SECTION boundaries, and previously initialized deferred struct pages.
Affected software
Linux kernel
How to mitigate CVE-2026-93227
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3