Division by zero in Linux kernel - CVE-2026-46161
Published: May 29, 2026
Vulnerability identifier: #VU133037
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-46161
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to divide-by-zero in setup_geo() when processing a user-provided layout parameter with zero far_copies and the improved far set layout selected. A local user can supply a crafted layout value to cause a denial of service.
The issue is triggered when far_copies is zero under the improved far set layout.
How to mitigate CVE-2026-46161
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5
- https://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51
- https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0c
- https://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda
- https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4