The vulnerability of the tun_get_user() function in the Linux kernel’s TUN virtual network driver allows a attacker to increase their privileges.

The vulnerability of the tungetuser function in the Linux kernel’s TUN virtual network driver is related to buffer overflow attacks. Exploiting this vulnerability can allow an attacker to gain increased privileges...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix memory leaks in napigetfrags The issue was reported in kmemleak after running testprogs: Unreferenced object: 0xffff8881b1672dc0 size 232 Execution time: 4354712116 jiffies duration: 841.975 seconds Hex dump first 3...

Linux Distros Unpatched Vulnerability : CVE-2026-81000

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an...

CVE-2026-81000

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

DEBIAN-CVE-2026-81000

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

UBUNTU-CVE-2026-81000

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

CVE-2026-81000 net: tun: bound receive headroom

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

EUVD-2026-76323

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

CVE-2026-81000 net: tun: bound receive headroom

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tungetuser uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is...

PT-2026-90130

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tun get user uses tun-align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align ...

The vulnerability of the tun_xdp_one() function in the drivers/net/tun.c module of the Linux kernel’s network device driver allows a attacker to cause a service failure.

The vulnerability of the tunxdpone function in the drivers/net/tun.c file of the Linux kernel’s network device driver leads to an infinite loop when a condition for exiting the loop is not met. Exploiting this vulnerability could allow an attacker to cause a system failure...

The vulnerability of the tunPutUser() function in the drivers/net/tun.c file of the Linux kernel’s network device driver allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the tunPutUser function in the drivers/net/tun.c file of the Linux kernel network device driver is related to the lack of resource initialization. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of the...

The vulnerability of the tun_xdp_one() function in the drivers/net/tun.c module of the Linux kernel’s network device driver allows a attacker to cause a service failure.

The vulnerability of the tunxdpone function in the drivers/net/tun.c file of the Linux kernel’s network device driver module is related to the copying of buffers without checking the size of the input data. Exploiting this vulnerability could allow an attacker to cause a system failure...

OESA-2026-3206 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A...

CVE-2026-52940

A flaw was found in the Linux kernel's tun driver. An unprivileged user can exploit this vulnerability by setting the virtual network vnet header size to 24 bytes. This action causes the kernel to copy partially initialized stack memory to userspace when reading non-tunnel packets, leading to the...

CVE-2026-52940 tun: zero the whole vnet header in tun_put_user()

In the Linux kernel, the following vulnerability has been resolved: tun: zero the whole vnet header in tunputuser tunputuser declares an on-stack struct virtionethdrv1hashtunnel without zeroing it. For a non-tunnel skb, virtionethdrtnlfromskb only initializes the first 10 bytes sizeofstruct...

CVE-2026-46322

A flaw was found in the Linux kernel's tun driver. This vulnerability occurs when the buildskb function fails within tunxdpone, leading to a failure to free an allocated memory page. Each such failure results in a memory leak, where a 'page-frag chunk' is not released. Over time, repeated...

UBUNTU-CVE-2026-46322

In the Linux kernel, the following vulnerability has been resolved: tun: free page on buildskb failure in tunxdpone When buildskb fails in tunxdpone, the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhostnetbuildxdp allocated for the frame. ...

CVE-2026-46322 tun: free page on build_skb failure in tun_xdp_one()

In the Linux kernel, the following vulnerability has been resolved: tun: free page on buildskb failure in tunxdpone When buildskb fails in tunxdpone, the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhostnetbuildxdp allocated for the frame. ...

SUSE CVE-2026-23254

In the Linux kernel, the following vulnerability has been resolved: net: gro: fix outer network offset The udp GRO complete stage assumes that all the packets inserted the RX have the encapsulation flag zeroed. Such assumption is not true, as a few H/W NICs can set such flag when H/W offloading t...