SB20260917165 - Integer overflow in Linux kernel damon

Description

This security bulletin contains information about 1 vulnerability.

1) Integer overflow (CVE-ID: CVE-2026-89796)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/123e4619ab6c8ab1c4cb1d7a58311a2af13929cd
• https://git.kernel.org/stable/c/8a96a06e04d210845be5d9581c0e9e338947e8f8