Resource exhaustion in Linux kernel - CVE-2026-64415
Published: July 27, 2026
Vulnerability identifier: #VU139549
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-64415
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to improper resource management in swap_reclaim_full_clusters() in mm/swapfile.c when reclaiming large numbers of full swap clusters under heavy memory and swap load. A local attacker can trigger sustained memory and swap stress to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-64415
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3