CVE-2026-98568 vxlan: use one headroom snapshot for neighbour replies

In the Linux kernel, the following vulnerability has been resolved: vxlan: use one headroom snapshot for neighbour replies vxlannacreate samples LLRESERVEDSPACE to size the reply skb and then samples it again to reserve headroom. A concurrent vxlanchangelink can update neededheadroom between the...

CVE-2026-98568

The Linux kernel contains a Time-of-Check to Time-of-Use (TOCTOU) race condition within the vxlan component. Specifically, the vxlan_na_create() function samples LL_RESERVED_SPACE() twice: once to size the reply skb and again to reserve headroom. A concurrent call to vxlan_changelink() can update...

EUVD-2026-103613

In the Linux kernel, the following vulnerability has been resolved: vxlan: use one headroom snapshot for neighbour replies vxlannacreate samples LLRESERVEDSPACE to size the reply skb and then samples it again to reserve headroom. A concurrent vxlanchangelink can update neededheadroom between the...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: vxlan: It is required to have CAPNETADMIN in the device’s netns for the changelink function. A tunnel changelink operates on at most two netns: devnetdev and the sticky underlay netns vxlan-net. These two netns differ once the...

CVE-2026-68432: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: vxlan: require CAPNETADMIN in the device netns for changelink A tunnel changelink operates on at most two netns, devnetdev and the sticky underlay netns vxlan-net. They differ once the device is created in or moved to a netns oth...