CVE-2026-46321

Summary. CVE-2026-46321 concerns the Linux kernel tun/tap with vhost-net, where a short-frame rejection path in tun_xdp_one() can leak memory pages. Specifically, when a frame is shorter than ETH_HLEN, tun_xdp_one() returns -EINVAL without freeing the page allocated by vhost_net_build_xdp(). tun_...

CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46320 tap: free page on error paths in tap_get_user_xdp()

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46320 tap: free page on error paths in tap_get_user_xdp()

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

Linux Distros Unpatched Vulnerability : CVE-2026-46321

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tun: free page on short-frame rejection in tunxdpone tunxdpone returns -EINVAL on a frame shorter than ETHHLEN without freeing the page that vhostnetbuildxdp...

PT-2026-47758

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak occurs in the Linux kernel when the tun xdp one function returns -EINVAL for frames shorter than ETH HLEN without freeing the page allocated by vhost net build xdp. Because...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the tapgetuserxdp function failing when short frames are rejected or the buildskb function fails,...

CVE-2026-46321

In the Linux kernel, the following vulnerability has been resolved: tun: free page on short-frame rejection in tunxdpone tunxdpone returns -EINVAL on a frame shorter than ETHHLEN without freeing the page that vhostnetbuildxdp allocated for it. tunsendmsg discards that -EINVAL and still returns...

CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the tunxdpone function not releasing the page allocated by vhostnetbuildxdp when short frames are...

PT-2026-47757

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak occurs in the tap get user xdp function. When a frame is shorter than ETH HLEN, the function returns -EINVAL; similarly, it returns -ENOMEM if build skb fails. In both...

Linux Distros Unpatched Vulnerability : CVE-2026-46322

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

A vulnerability was discovered in vhostnewmsg in drivers/vhost/vhost.c within the Linux kernel. This issue arises due to the improper initialization of memory in messages transmitted between virtual guests and the host operating system, as implemented in the vhostnewmsg function. This vulnerabili...

Astra Linux – Vulnerability in Linux 5.10, Linux

A use-after-free flaw was discovered in vhostnetsetbackend in drivers/vhost/net.c within the virtio network subcomponent of the Linux kernel, due to a double fget operation. This flaw could allow a local attacker to cause the system to crash, and could even lead to a kernel information leak issue...

Azure Linux 3.0 Security Update: qemu (CVE-2024-4693)

The version of qemu installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-4693 advisory. - A flaw was found in the QEMU Virtio PCI Bindings hw/virtio/virtio-pci.c. An improper release and use of the irq...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000624)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000624 advisory. Use-after-free vulnerability in the vhostnetsetbackend function in drivers/vhost/net.c in the Linux kernel through 3.10.3 allows local users to cause a denial of...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004165)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004165 advisory. An infinite loop issue was found in the vhostnet kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packets in handlerx. It could...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000666)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000666 advisory. drivers/vhost/net.c in the Linux kernel before 3.13.10, when mergeable buffers are disabled, does not properly validate packet lengths, which allows guest OS users t...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-004245)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004245 advisory. In the Linux kernel before 5.5.8, getrawsocket in drivers/vhost/net.c lacks validation of an skfamily field, which might allow attackers to trigger kernel stack...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001087)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001087 advisory. The getrxbufs function in drivers/vhost/net.c in the vhost-net subsystem in the Linux kernel package before 2.6.32-431.11.2 on Red Hat Enterprise Linux RHEL 6 does n...