CLSA-2026-1777321102 Fix CVE(s): CVE-2022-26923, CVE-2022-32743

SECURITY UPDATE: Samba AD DC did not enforce the Validated-DNS-Host-Name write right, allowing an unprivileged authenticated user with machine account write access e.g. SeMachineAccountPrivilege to set the dNSHostName attribute to an arbitrary value, bypassing the MS-ADTS requirement that it matc...

HTB-WingData-Writeup

HackTheBox - WingData Writeup Difficulty: Easy | OS: L...

Machine-Checked Cardinality Bounds for Masked Barrett Reduction: A 1-Bit Side-Channel Leakage Barrier in Post-Quantum Cryptographic Hardware

Barrett reduction is the nonlinear core of every practical NTT-based post-quantum cryptography implementation. Existing composition frameworks ISW, t-SNI, PINI, DOM address Boolean masking over GF2; none provides a machine-checked characterization of Barrett's leakage under first-order arithmetic...

secops-ai-threat-analyzer

🛡️ SecOpsAI: Threat Analysis & Adaptive Security Engine An e...

KVM: x86: Use scratch field in MMIO fragment to hold small write values

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KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish

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KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU

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Exploit for CVE-2025-2304

HackTheBox — Facts Machine Writeup !HackTheBoxhttps://img...

CVE-2026-31593

A flaw was found in the Linux kernel's KVM Kernel-based Virtual Machine virtualization module. When Secure Nested Paging SNP is enabled, an attempt to update the state of an already running and encrypted virtual machine can cause the host system to crash. This vulnerability leads to a Denial of...

CVE-2026-31591

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM component. This vulnerability allows a local user in userspace to manipulate or run a virtual CPU vCPU while its state is being synchronized during the Secure Nested Paging SNP launch process. This improper synchronization ca...

CVE-2026-31588

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM component. This vulnerability, a use-after-free, occurs when KVM processes Memory-mapped I/O MMIO writes that span across different memory pages, and an internal temporary variable is used. A malicious guest operating system ...

CVE-2026-31558

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM component. A local attacker could potentially trigger an out-of-bounds memory access by providing a negative 'cpuid' parameter to the 'kvmgetvcpubycpuid' function. This could lead to system instability or potentially other...

DEBIAN-CVE-2026-31591

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as allowing userspace to manipulate and/or run a vCPU while its state is being...

CVE-2026-31592

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Protect all of sevmemencregisterregion with kvm-lock Take and hold kvm-lock for before checking sevguest in sevmemencregisterregion, as sevguest isn't stable unless kvm-lock is held or KVM can guarantee KVMSEVINIT2 has...

CVE-2026-31593

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU Reject synchronizing vCPU state to its associated VMSA if the vCPU has already been launched, i.e. if the VMSA has already been encrypted. On a host wit...

CVE-2026-31591

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as allowing userspace to manipulate and/or run a vCPU while its state is being...

CVE-2026-31564

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Fix base address calculation in kvmeiointcregsaccess In function kvmeiointcregsaccess, the register base address is caculated from array base address plus offset, the offset is absolute value from the base address...

CVE-2026-31553

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix the descriptor address in kvmatswapdesc Using "u64 user hva + offset" to get the virtual addresses of S1/S2 descriptors looks really wrong, if offset is not zero. What we want to get for swapping is hva + offset,...

EUVD-2026-25486

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU Reject synchronizing vCPU state to its associated VMSA if the vCPU has already been launched, i.e. if the VMSA has already been encrypted. On a host wit...

CVE-2026-31591

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as allowing userspace to manipulate and/or run a vCPU while its state is being...