CVE-2026-90077
kernel: net: fix a resource leak in copy_net_ns() error handling path
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 6, 2026
Description
A flaw was found in the Linux kernel's network (net) subsystem. An issue in the copy_net_ns() error handling path allows for resources allocated during network namespace creation to leak. This occurs because the preinit_net() function returns prematurely, preventing proper resource deallocation. A local attacker could exploit this resource leak to cause a denial of service (DoS) on the system.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime