Integer overflow in Linux kernel - CVE-2026-89796
Published: September 17, 2026
Vulnerability identifier: #VU150487
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89796
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer overflow in kdamond_merge_regions() in the DAMON core when merging DAMON regions after online parameter updates. A local user can configure DAMON with an excessively large aggregation interval and numerous non-contiguous regions to cause a denial of service.
Exploitation requires the region count to remain above the user-defined upper limit after aggressive merging.
Affected software
Linux kernel
How to mitigate CVE-2026-89796
Install security update from vendor's repository.