Double free in Linux kernel - CVE-2026-43481
Published: May 14, 2026
Vulnerability identifier: #VU131429
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-2026-43481
CWE-ID: CWE-415
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 a double free in net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit() when handling netlink reply messages after genlmsg_reply() failure. A local user can trigger an error path that frees the same skb twice to cause a denial of service.
How to mitigate CVE-2026-43481
Install security update from vendor's repository.