vsock_poc

vsockpoc Investigando el error detrás de CVE-2021-26708 Este repositorio contiene un pequeño informe sobre CVE-2021-26708, y cómo este error puede convertirse en una primitiva de escritura Use After Free. El PoC aquí no es un exploit completo, sino solo mi andamiaje que usé al intentar investigar...

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 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

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...

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...

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...

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 — エクスプロイトラボ 教育的および許可されたセキュリティ研究目的のみに使用してください。 説明 CVE-2025-21756 は、2025年2月26日に公開された Linux カーネルの vsock 仮想ソケット サブシステムにおける use-after-free UAF 脆弱性です。影響を受ける Linux システム上で、ローカルの攻撃者が root への権限昇格 を可能にします。 CVSS v3.1: 7.8 重要 ベクトル: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CWE: CWE-416 解放後使用...

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 found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: vhost/vsock: Always initialize seqpacketallow. There are two issues related to seqpacketallow: 1. seqpacketallow is not initialized when a socket is created. Therefore, if no features are set, it will be read uninitialized. 2...

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...