CVE-2021-3656-Demo

CVE-2021-3656: 이 문제는 virtext VMCB 필드에 대한 검증 누락으로 인해 발생하며, 악의적인 L1 게스트가 L2 게스트에 대한 VMLOAD/VMSAVE 인터셉트와 VLSVirtual VMLOAD/VMSAVE를 모두 비활성화할 수 있게 합니다. 이러한 상황에서 L2 게스트는 인터셉트되지 않은 VMLOAD/VMSAVE를 실행할 수 있으며, 따라서 호스트 물리 메모리의 일부를 읽거나 쓸 수 있습니다. Linux Kernel에 접근하기 위한 환경 설정: 1. Docker 컨테이너나 가상 머신을 사용할 수 있습니다...

AlmaLinux 9.2 [TuxCare] Security Update: bpftool / kernel / kernel-abi-stablelists / kernel-core / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2025:1743193221)

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2025:1743193221 advisory. - In the Linux kernel, the following vulnerability has been resolved: asix: fix uninit-value in asixmdioread asixreadcmd may read le...

CVE-2026-100723: Exposure of Sensitive Information to an Unauthorized Actor

vm2 before 3.12.2 does not apply its Buffer backing-store ownership invariant byteOffset === 0 and buffer.byteLength === length to Buffers returned from host builtin modules. When an application explicitly exposes Node's zlib module through NodeVM's builtin allowlist require: builtin: 'zlib' ,...

kernel: nvme-tcp: fix host memory disclosure on R2T for a read command

A flaw was found in the Linux kernel's NVMe Non-Volatile Memory Express over TCP nvme-tcp component. A malicious NVMe controller can exploit this vulnerability by sending a Ready to Transfer R2T command for a read request. The host system, failing to properly validate the request direction, will...

Information Exposure

Overview vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Information Exposure via the Buffer pool. An attacker can access and manipulate host memory by leveraging sandboxed code to acquire ArrayBuffers from...

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

In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fixed the issue of freeing the HMB descriptor table. The HMB descriptor table is sized based on the maximum number of descriptors that can be used for a given device. However, nvmeallochostmem might break out of the loo...

Astra Linux – Vulnerability in containerd-app

Containerd is an open-source container runtime. Versions 1.7.28 and below, 2.0.0-beta.0 through 2.0.6, 2.1.0-beta.0 through 2.1.4, and 2.2.0-beta.0 through 2.2.0-rc.1 contain a bug in the CRI Attach implementation, where a user may exhaust memory on the host due to goroutine leaks. This issue has...

Astra Linux – Vulnerability in Linux

The file arch/powerpc/kvm/book3srtas.c in the Linux kernel, as of version 5.13.5 on the PowerPC platform, allows KVM guest OS users to cause memory corruption in the host OS through rtasargs.nargs, also known as CID-f62f3c20647e...

Astra Linux – Vulnerability in Qemu

An information disclosure vulnerability was discovered in the virtio vhost-user GPU device vhost-user-gpu of QEMU in versions up to and including 6.0. The flaw resides in the virglcmdgetcapsetinfo function in contrib/vhost-user-gpu/virgl.c, and can occur due to the reading of uninitialized memory...

Astra Linux – Vulnerability in Linux

A flaw was discovered in the KVM’s AMD code, which handles SVM nested virtualization. The flaw occurs during the processing of the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the “virtext” field, this issue could all...

CVE-2026-89481

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandler2t does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:...

UBUNTU-CVE-2026-89481

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandler2t does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:...

CVE-2026-89481

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandler2t does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:...

EUVD-2026-76387

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandler2t does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:...

CVE-2026-89481 nvme-tcp: fix host memory disclosure on R2T for a read command

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandler2t does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:...

PT-2026-90197

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nvme-tcp module where the nvme tcp handle r2t function fails to verify the direction of the request associated with a Ready-to-Transfer R2T notification. A malicio...

JLSEC-2026-1364 Wasmtime has out-of-bounds write or crash when transcoding component model strings

Impact Wasmtime's implementation of transcoding strings between components contains a bug where the return value of a guest component's realloc is not validated before the host attempts to write through the pointer. This enables a guest to cause the host to write arbitrary transcoded string bytes...

JLSEC-2026-1352 Wasmtime WASI implementations are vulnerable to guest-controlled resource exhaustion

Impact Wasmtime's implementation of WASI host interfaces are susceptible to guest-controlled resource exhaustion on the host. Wasmtime did not appropriately place limits on resource allocations requested by the guests. This serves as a Denial of Service vector where a guest can induce a range of...

Security Bulletin: This Power System update is being released to address CVE-2026-16933

Summary Power Systems Firmware is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker with service account or root access to the BMC/FSP can read and write arbitrary regions of host system memory, giving full control over the host system and all hoste...

EUVD-2026-62697

IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through FW950.H2, OP940.00 through OP940.a1 Power9, and OP940.00 through OP940.81 Power HMC is affected by a vulnerability in the interface between the BMC/FSP and the host system. An attacker...