Out-of-bounds read in Linux kernel - CVE-2026-46020
Published: May 28, 2026
Vulnerability identifier: #VU132470
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46020
CWE-ID: CWE-125
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 privileged user to cause a denial of service.
The vulnerability exists due to out-of-bounds memory access in mm/damon/core when processing DAMON_SYSFS quota goal node identifiers for node_mem_used_bp and node_mem_free_bp. A local privileged user can set an arbitrary node id value via DAMON_SYSFS to cause a denial of service.
The issue can be triggered using the DAMON user-space tool.
How to mitigate CVE-2026-46020
Install security update from vendor's repository.