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...

CVE-2026-80932

A flaw was found in the Linux kernel, specifically within the vsock/virtio component. An incorrect order of flushing work items during the removal of a virtiovsock object can lead to a use-after-free condition. This vulnerability allows a race condition where memory can be freed while still in us...

AZL-100383 CVE-2026-80932 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

CVE-2026-80932

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

CVE-2026-80932

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

CVE-2026-80932 vsock/virtio: flush works in dependency order

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

CVE-2026-80932

A use-after-free vulnerability in the Linux kernel's vsock/virtio component is triggered during virtio_vsock_remove(). The function flushes work items before freeing the virtio_vsock object, but the flush order ignores dependencies: send_pkt_work can queue rx_work after the remove path has alread...

EUVD-2026-76255

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

CVE-2026-80932 vsock/virtio: flush works in dependency order

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtiovsockremove stops the virtqueues and then flushes each work item before freeing the enclosing virtiovsock. The current order does not account for dependencies between those item...

PT-2026-90062

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: flush works in dependency order virtio vsock remove stops the virtqueues and then flushes each work item before freeing the enclosing virtio vsock. The current order does not account for dependencies between those...

CVE-2025-21756

CVE-2025-21756 — Laboratorio de explotación Solo para fines educativos y de investigación de seguridad autorizada. Descripción CVE-2025-21756 es una vulnerabilidad de use-after-free UAF en el subsistema vsock Virtual Socket del kernel de Linux, divulgada el 26 de febrero de 2025. Permite a un...

kernel: Kernel: Privilege escalation via uninitialized data in vmci transport packet

A flaw was found in the Linux kernel's vsock/vmci component. A local attacker with low privileges could exploit a vulnerability where the vmcitransportpacket structure is not properly cleared during initialization. This can lead to the use of uninitialized data, potentially allowing for informati...

The vulnerability of the vmci_transport_recv_listen() function in the net/vmw_vsock/vmci_transport.c module, which is part of the networking functions of the Linux kernel, allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the vmcitransportrecvlisten function in the net/vmwvsock/vmcitransport.c module, which is part of the networking functions of the Linux kernel, is related to resource management errors. Exploiting this vulnerability could allow an attacker to compromise the confidentiality,...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098945)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098945 advisory. In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect if already established During connect, acting on a...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098841)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098841 advisory. In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: cap TX credit to local buffer size The virtio transports derives its TX credit...

CVE-2026-74613

A flaw was found in the Linux kernel's vsock/virtio component. A race condition during the teardown of the receive RX queue can allow work to add buffers after the virtual queues virtqueues have been deleted. This can lead to a use-after-free vulnerability, which may result in a kernel panic and ...

CVE-2026-74614

A flaw was found in the Linux kernel's vsock/virtio component. During system suspend and resume operations, a worker process might incorrectly retain a pointer to a deleted virtual queue while observing a replacement queue's running state. This inconsistent state can lead to system instability or...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: virtio/vsock: Fixed an uninit-value issue in virtiotransportrecvpkt KMSAN reported the following uninit-value access issues: ===================================================== BUG: KMSAN: uninit-value in...

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...