Infinite loop in Linux kernel - CVE-2026-63982
Published: July 20, 2026
Vulnerability identifier: #VU138666
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-2026-63982
CWE-ID: CWE-835
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 improper loop detection in act_mirred in the traffic control subsystem when processing mirred redirect actions to ingress. A local user can configure redirect rules that create a mirred loop to cause a denial of service.
The issue occurs because loop state can be lost when packets are deferred into the backlog during ingress redirection.
How to mitigate CVE-2026-63982
Install security update from vendor's repository.