Nimbo-C2

Nimbo-C2 Nimbo-C2 About Features Installation Easy Way Easier Way Usage Limitations, Warnings, Notes Contribution About Nimbo-C2 is yet another simple and lightweight C2 framework. Nimbo-C2 agent supports x64 Windows & Linux. It's written in Nim, with some usage of .NET on Windows by dynamically...

linux_injector

linuxinjector A simple ptrace-less shared library injector for x64 Linux. Usage linuxinjector mode 1. normal dlopen 2. memfd + dlopen for injecting into containers 3. raw shellcode pid Target process id. Must have ptrace rights to it required for accessing /proc/$pid/mem. Not ptraced, so another...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: secretmem: Disable memfdsecret if arch cannot set the direct map. The memfdsecret syscall returns -ENOSYS if !cansetdirectmap is true. This occurs, for example, in some arm64 configurations, where marking 4k PTEs in the direct ma...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fixed a use-after-free race condition in the fault handler. When a page fault occurs in a secret memory file created with memfdsecret2, the kernel will allocate a new folio for it, mark the underlying page as not...

kernel: memfd: deny writeable mappings when implying SEAL_WRITE

A flaw was found in the Linux kernel's memfd component. When the SEALEXEC flag is used to create a memory file descriptor, the SEALWRITE flag is implicitly applied to prevent writing to executable memory. However, this implicit write protection is applied after checks that should deny writable...

kernel: memfd: deny writeable mappings when implying SEAL_WRITE

A flaw was found in the Linux kernel's memfd component. When the SEALEXEC flag is used to create a memory file descriptor, the SEALWRITE flag is implicitly applied to prevent writing to executable memory. However, this implicit write protection is applied after checks that should deny writable...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: fs: export anoninodemakesecureinode and fix the issue with secretmem LSM bypass. The anoninodemakesecureinode function was exported to allow KVM guestmemfd to create anonymous inodes with proper security context. This replaces...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: A panic occurs when growing a memfdsecret. When attempting to grow an existing memfdsecret using ftruncate, a panic occurs 1. For example, performing the following reliably will cause the panic: c fd = memfdsecret;...

kernel: memfd: deny writeable mappings when implying SEAL_WRITE

A flaw was found in the Linux kernel's memfd component. When the SEALEXEC flag is used to create a memory file descriptor, the SEALWRITE flag is implicitly applied to prevent writing to executable memory. However, this implicit write protection is applied after checks that should deny writable...

kernel: memfd: deny writeable mappings when implying SEAL_WRITE

A flaw was found in the Linux kernel's memfd component. When the SEALEXEC flag is used to create a memory file descriptor, the SEALWRITE flag is implicitly applied to prevent writing to executable memory. However, this implicit write protection is applied after checks that should deny writable...

UBUNTU-CVE-2026-68455

In the Linux kernel, the following vulnerability has been resolved: liveupdate: validate session type before performing operation The sessions ioctls are not applicable to all session types. PRESERVEFD is only applicable to outgoing sessions. RETRIEVEFD and FINISH are only valid for incoming...

CVE-2026-68455 liveupdate: validate session type before performing operation

In the Linux kernel, the following vulnerability has been resolved: liveupdate: validate session type before performing operation The sessions ioctls are not applicable to all session types. PRESERVEFD is only applicable to outgoing sessions. RETRIEVEFD and FINISH are only valid for incoming...

PT-2026-72167

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the liveupdate component where session ioctls are not properly validated against session types. Specifically, the PRESERVE FD operation is only applicable to outgoing...

The vulnerability of the memfd_alloc_folio() function in the mm/memfd.c module of the Linux kernel’s memory management subsystem allows a hacker to gain unauthorized access to protected information.

The vulnerability of the memfdallocfolio function in the mm/memfd.c module of the Linux kernel’s memory management subsystem is related to the use of an uninitialized resource. Exploiting this vulnerability could allow a attacker to gain unauthorized access to protected information...

UBUNTU-CVE-2026-64283

In the Linux kernel, the following vulnerability has been resolved: KVM: guestmemfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guestmemfd file, treat the offset and size as unsigned values to fix a bug where the sum of the two can result in a false negative...

CVE-2026-64283 KVM: guest_memfd: Treat memslot binding offset+size as unsigned values

In the Linux kernel, the following vulnerability has been resolved: KVM: guestmemfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guestmemfd file, treat the offset and size as unsigned values to fix a bug where the sum of the two can result in a false negative...

CVE-2026-64283 KVM: guest_memfd: Treat memslot binding offset+size as unsigned values

In the Linux kernel, the following vulnerability has been resolved: KVM: guestmemfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guestmemfd file, treat the offset and size as unsigned values to fix a bug where the sum of the two can result in a false negative...

CVE-2026-64283

In the Linux kernel, the following vulnerability has been resolved: KVM: guestmemfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guestmemfd file, treat the offset and size as unsigned values to fix a bug where the sum of the two can result in a false negative...

CVE-2026-64283

The CVE-2026-64283 issue affects the Linux kernel KVM guest_memfd binding: binding a memslot to a guest_memfd could overflow when computing offset+size due to signed interpretation. The bug arises because offset and size were not treated as unsigned values, risking a negative sum that could bypas...

Linux Distros Unpatched Vulnerability : CVE-2026-64283

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: guestmemfd: Treat memslot binding offset+size as unsigned values When binding a memslot to a guestmemfd file, treat the offset and size as unsigned values ...