vsock_poc

vsockpoc Investigating the bug behind CVE-2021-26708 This repo contains a small writeup about CVE-2021-26708, and how this bug can be turned into a Use After Free write primitive. The PoC here is not a full exploit, but just my harness I used when trying to investigate this bug. It can successful...

EUVD-2026-87850

Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to...

DEBIAN-CVE-2026-97988

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

CVE-2026-97988

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

AZL-104721 CVE-2026-97988 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

EUVD-2026-86642

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

CVE-2026-97988

The Linux kernel contains a vulnerability in vhost-net and vhost-vsock related to vring access during IOTLB transitions . When VIRTIO_F_ACCESS_PLATFORM changes, cached vring pointers and IOTLB metadata may be interpreted in the wrong address space, potentially leaving stale ring mappings in use. ...

CVE-2026-97988 vhost: invalidate vring access on IOTLB transitions

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

CVE-2026-97988 vhost: invalidate vring access on IOTLB transitions

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

CVE-2026-97988

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

Linux Distros Unpatched Vulnerability : CVE-2026-97988

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different...

UBUNTU-CVE-2026-97988

In the Linux kernel, the following vulnerability has been resolved: vhost: invalidate vring access on IOTLB transitions When VIRTIOFACCESSPLATFORM changes, cached vring pointers and IOTLB metadata are interpreted in a different address space. Keeping them across the transition can leave stale rin...

CVE-2025-21756

CVE-2025-21756 — Exploitation Lab For educational and authorized security research purposes only. Description CVE-2025-21756 is a use-after-free UAF vulnerability in the Linux kernel's vsock Virtual Socket subsystem, disclosed on February 26, 2025. It allows a local attacker to escalate privilege...

Linux Distros Unpatched Vulnerability : CVE-2026-90138

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - vsock: don't check the listener's skerr in vsockaccept Syzbot reported an issue which can be reproduced with these steps: r0 = socketAFVSOCK, SOCKSTREAM, 0...

CVE-2026-90138 vsock: don't check the listener's sk_err in vsock_accept()

In the Linux kernel, the following vulnerability has been resolved: vsock: don't check the listener's skerr in vsockaccept Syzbot reported an issue which can be reproduced with these steps: r0 = socketAFVSOCK, SOCKSTREAM, 0 bindr0, VMADDRCIDANY, PORT connectr0, VMADDRCIDLOCAL, PORT - -1, EPROTO...

CVE-2026-90138 vsock: don't check the listener's sk_err in vsock_accept()

In the Linux kernel, the following vulnerability has been resolved: vsock: don't check the listener's skerr in vsockaccept Syzbot reported an issue which can be reproduced with these steps: r0 = socketAFVSOCK, SOCKSTREAM, 0 bindr0, VMADDRCIDANY, PORT connectr0, VMADDRCIDLOCAL, PORT - -1, EPROTO...

CVE-2026-90138: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: vsock: don't check the listener's skerr in vsockaccept Syzbot reported an issue which can be reproduced with these steps: r0 = socketAFVSOCK, SOCKSTREAM, 0 bindr0, VMADDRCIDANY, PORT connectr0, VMADDRCIDLOCAL, PORT - -1, EPROTO...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in the vhost-vsock device of QEMU. In the event of an error, an invalid element was not detached from the virtqueue before freeing its memory, resulting in memory leakage and other unexpected issues. This issue affects QEMU versions up to 6.2.0...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: vhost/vsock: Use kvmalloc/kvfree for larger packets. When copying a large file via sftp using vsock, the data size is usually 32 kB. In such cases, kmalloc seems to fail when attempting to allocate 32 32 kB regions. vhost-5837...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

A vulnerability has been discovered in the Linux kernel. It has been identified as a problem. This vulnerability affects the function vsockconnect in the file net/vmwvsock/afvsock.c. Manipulation of this function leads to a memory leak. The complexity of an attack is quite high. Exploitation of...