Astra Linux – Vulnerability in Qemu

A use-after-free vulnerability was discovered in the virtio-net device of QEMU. This vulnerability can occur when the address of the descriptor belongs to the non-direct access region, due to the numbuffers being set after the virtqueue elem has been unmapped. A malicious guest can exploit this...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: The recursive rtnllock function occurs during the probe operation. This deadlock appears in a stack trace like this: virtnetprobe rtnllock virtioconfigChangedWork netdevNotifyPeers rtnllock This occurs when the VMM...

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

In the Linux kernel, the following vulnerabilities have been resolved: - Do not allow gsosize to be set to GSOBYFRAGS. One missing check in virtionethdrtoskb allowed syzbot to crash kernels again 1. Do not allow gsosize to be set to GSOBYFRAGS 0xffff, because this magic value is used by the kerne...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in QEMU. The async nature of hot-unplug allows for a race condition, where the net device backend is cleared before the virtio-net PCI frontend is unplugged. A malicious guest could exploit this time window to trigger an assertion and cause a denial of service...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: virtionet: Do not send RSS commands if the feature is not available on the device. There is a bug when setting RSS options in virtionet that can cause the entire machine to become unstable, leading to an infinite loop in the...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: virtionet: Added a check for hashkeylength. A check for hashkeylength was added in virtnetprobe to avoid possible out-of-bounds errors when setting/read the hash key...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: Added validation for the used length. This addition ensures that the used length is validated which may come from an untrusted device, to prevent data corruption or loss...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: A overflow occurred within the virtnetrqalloc function. When a fragment receives only one page, it may lead to regressions in the virtual machine. This issue is particularly significant if the sysctl...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-pci: The result size returned for the admin command completion has been corrected. The result size returned by virtiopciadmindevpartsget is 8 bytes larger than the actual result data size. This occurs because the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtionet: a memory leak inside XPDTX has been fixed using mergeable. When we call xdpconvertbufftoframe to obtain xdpf, if it returns NULL, we should check whether xdppage was allocated by xdplinearizepage. If it was newly...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: virtionet: Fixed a misalignment bug in the struct virtnetinfo structure. Use the new TRAILINGOVERLAP helper to fix the misalignment bug, along with the following warning: drivers/net/virtionet.c:429:46: warning: Structure...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtionet: fixed device mismatch in devmkzalloc/devmkfree The initial rsshdr allocation uses virtiodevice-device, but virtnetsetqueues frees resources using netdevice-device. This device mismatch causes the following devres...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: xsk: rx: fix the frame’s length check When calling buftoxdp, the len argument represents the length of the frame’s data, excluding the length of the virtio header vi-hdrlen. We check that len is not greater than the...

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

In the Linux kernel, the following vulnerability has been resolved: virtionet: Fixed the warning from napibcacheput. After the commit bdacf3e34945 “net: Use nested-BH locking for napialloccache.” was merged, the following warning began to appear: WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: virtio-net: The issue of checking the received length in large packets has been fixed. Since commit 4959aebba8c0 “virtio-net: Use the MTU size as the buffer length for large packets”, when the guest gso is disabled, the allocated...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: In the net subsystem, there is a issue where packets with the type UFO are dropped in the udprcvSegment function. When sending a packet with the virtionethdr structure to a tun device, if the gsotype field in the virtionethdr...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: virtio-net: Ensure that the received length does not exceed the allocated size. In xdplinearizepage, when reading the following buffers from the ring, we forget to check the received length against the actual allocated size. This...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: virtionet: Fixed the issue with xdprxqinfo after suspend/resume. The following sequence currently causes a driver bug warning when using virtionet: bash ip link set eth0 up echo mem /sys/power/state or e.g. rtcwake -s 10 -m mem i...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-net: Fixed pages leaking when building skb in big mode. We attempt to use buildskb if there is sufficient “tailroom”. However, we forget to release the unused pages that are chained via private in big mode, which can lead ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: vdpa/mlx5: added validation for the VIRTIONETCTRLMQVQPAIRSSET command When the control vq receives a VIRTIONETCTRLMQVQPAIRSSET command request from the driver, there is currently no validation of the number of queue pairs to be...