CVE-2026-80845

CVE-2026-80845 affects the Linux kernel xfrm subsystem, specifically the NAT keepalive worker. The root cause is an AB-BA lock inversion : nat_keepalive_work() acquires x->lock while holding xfrm_state_lock, whereas the SA deletion path (xfrm_state_delete() / __xfrm_state_delete()) takes the s...

CVE-2026-80845

In the Linux kernel, the following vulnerability has been resolved: xfrm: avoid lock inversion in nat keepalive work natkeepalivework walks the state table while xfrmstatewalk holds net-xfrm.xfrmstatelock. Its callback then acquires x-lock, which conflicts with the delete path taking the same loc...

The vulnerability of the xfrm_nat_keepalive_net_init() function in the net/xfrm/xfrm_nat_keepalive.c module, which implements networking functions in the Linux kernel, allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the xfrmnatkeepalivenetinit function in the net/xfrm/xfrmnatkeepalive.c module, which implements networking functions in the Linux kernel, is related to state management errors. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity...

PT-2026-72325

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to July 2026 Description A double free issue exists in the xfrm component of the Linux kernel. The nat keepalive send function frees the keepalive skb socket buffer whenever the IPv4 or IPv6 send helper reports an...

Important: kernel6.12

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: landlock: Fix handling of disconnected directories CVE-2025-68736 In the Linux kernel, the following vulnerability has been resolved: arm64/fpsimd: signal: Fix restoration of SVE context CVE-2026-23102 In the Linu...

CVE-2026-31406

A flaw was found in the Linux kernel, specifically within its xfrm IP eXtensible FRamework component. This vulnerability arises from a race condition during network cleanup, where a scheduled task natkeepalivework can be re-activated and attempt to operate on memory that has already been freed...

CVE-2026-31406

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

UBUNTU-CVE-2026-31406

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

CVE-2026-31406

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

CVE-2026-31406 xfrm: Fix work re-schedule after cancel in xfrm_nat_keepalive_net_fini()

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

CVE-2026-31406

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

CVE-2026-31406

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes remaining states via xfrmstatedelete, which calls...

PT-2026-30574

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw within the xfrm subsystem related to the handling of delayed work cancellation in xfrm nat keepalive net fini. Specifically, the use of cancel delayed wo...

Linux Distros Unpatched Vulnerability : CVE-2026-31406

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - xfrm: Fix work re-schedule after cancel in xfrmnatkeepalivenetfini After canceldelayedworksync is called from xfrmnatkeepalivenetfini, xfrmstatefini flushes...

High CPU load on a Windows Server 2012 R2-based server because NAT keep-alive timer isn't cleaned up

High CPU load on a Windows Server 2012 R2-based server because NAT keep-alive timer isn't cleaned up This article describes an issue in which high CPU load occurs on a Windows Server 2012 R2-based server. Before you install this update, see the Prerequisites section. Symptoms Assume that a VPN...