Memory leak in Linux kernel - CVE-2026-46172
Published: May 29, 2026
Vulnerability identifier: #VU133028
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-46172
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a memory leak in xfrm6_rcv_encap() when processing IPv6 packets that trigger an error route lookup. A remote attacker can send specially crafted packets to cause a denial of service.
Repeated packets hitting this path leak dst entries.
How to mitigate CVE-2026-46172
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13
- https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a
- https://git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561f
- https://git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078
- https://git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4