Astra Linux – Vulnerability in Linux, Linux 5.10

A guest can force the Linux netback driver to consume a large amount of kernel memory. This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVEs. Incoming data packets for a guest in the Linux kernel’s netback driver are buffere...

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

In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: This issue prevents a Use-after-Free UAF condition in xenvifFlushHash. During the listforeachentryrcu iteration, when calling xenvifFlushHash, kfreercu does not exist within the rcu read critical section...

Astra Linux – Vulnerability in Linux, Linux 5.10

A guest can force the Linux netback driver to consume a large amount of kernel memory. This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVEs. Incoming data packets for a guest in the Linux kernel’s netback driver are buffere...

Astra Linux – Vulnerability in Linux

A issue was discovered in the Linux kernel through version 5.11.3, when it was used with Xen PV. A certain part of the netback driver lacks proper handling of errors, such as failed memory allocations as a result of changes to the way errors related to grant mapping are handled. A denial-of-servi...

Astra Linux – Vulnerability in Linux 5.10, Linux

The fix for XSA-423 added logic to the Linux’ netback driver to handle cases where a packet is split by a frontend, resulting in not all of the headers being together in one piece. Unfortunately, the introduced logic did not account for the extreme case where the entire packet is split into as ma...

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

Guests can trigger the reset/abort/crash of the NIC interface through netback. It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux-based network backend by sending certain types of packets. It seems to be an unstated assumption in the rest of the Linux network stack...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: xen/netback: Avoid entering xenvifrxnextskb with an empty rx queue. xenvifrxnextskb expects the rx queue not to be empty. However, if the loop in xenvifrxaction performs multiple iterations, the availability of another skb in the...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-053433)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-053433 advisory. In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvifflushhash During the listforeachentryrcu iteration call of...

ROS-20260904-73-0012

The vulnerability of the xen-netback driver in Linux operating systems is related to improper blocking mechanisms. Exploiting this vulnerability can allow attackers to cause service failures...

The vulnerability of the xen-netback component in the Linux operating system’s kernel allows a hacker to trigger a service failure.

The vulnerability of the xen-netback component in the Linux operating system’s kernel is related to incorrect checking of the amount of data at the input. Exploiting this vulnerability can allow an attacker to cause a service failure...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: xen-netback: Rejects configurations with a zero queue count from guests. A malicious or faulty Xen guest can set the value of the xenbus key “multi-queue-num-queues” to “0”. The connect function in the backend only validates the...

SUSE CVE-2026-45890

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

CVE-2026-45890

A flaw was found in the Linux kernel's xen-netback component. A malicious or buggy Xen guest can exploit this by writing a zero value to the 'multi-queue-num-queues' xenbus key. This improper input validation can trigger a warning in the kernel's memory allocation, leading to a guest-to-host Deni...

EUVD-2026-32356

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

CVE-2026-45890

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

UBUNTU-CVE-2026-45890

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

CVE-2026-45890 xen-netback: reject zero-queue configuration from guest

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

CVE-2026-45890

The CVE-2026-45890 issue affects the Linux kernel xen-netback in Xen environments. The backend validated the upper bound of multi-queue config but did not reject zero, allowing a guest to set multi-queue-num-queues to 0. This leads to vzalloc(array_size(0, sizeof(struct xenvif_queue))) and WARN_O...

CVE-2026-45890

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...

CVE-2026-45890 xen-netback: reject zero-queue configuration from guest

In the Linux kernel, the following vulnerability has been resolved: xen-netback: reject zero-queue configuration from guest A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect function in the backend only validates the upper bound requestednumqueue...