userland-exec

Userland Exec Userland exec replaces the existing process image within the current address space with a new one. It mimics the behavior of the system call execve, but the process structures describing the process image remain unchanged. In other words, the process name reported by system utilitie...

ulexecve

Quick Start Execute dynamic or statically compiled ELF Linux binaries without ever calling execve. cat /bin/echo | ulexecve - hello hello Introduction This Python tool is called ulexecve and it stands for userland execve. It helps you execute arbitrary ELF binaries on Linux systems from userland...

shellcode

shellcode “A vulnerability provides an assembly language for a computer that has never been programmed before, and that was not designed with programmability in mind.” -- Halvar Flake A collection of new and old shellcode samples. Article https://hnsecurity.it/blog/new-and-old-shellcode-samples/...

Linux_X86_Reverse_TCP_Alphanumeric_Staged_Shellcode_Execve-bin-bash

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Webmin_Exploit_reverse_shell

ntroduction: The Webmin Exploit is a targeted exploit for the Webmin service, which can be exploited on older versions of Webmin. This exploit uses various techniques to execute malicious code and gain unauthorized access to the target system. It involves: Using both C and Assembly code to execut...

SLAE

SLAE Securitytube Linux Assembly Expert SLAE SLAE-721 Build + Assembling ... + Linking ... + Extract Shellcode from binary ... "\x31\xc0\x50\x68\x2f\x2f\x73\x68" "\x68\x2f\x62\x69\x6e\x89\xe3\x89" "\xc1\xb0\x0b\xcd\x80" + Create C-Header file ... + Compile PoC ... + Run PoC ... + Shellcode Length...

experiments

Experiments Repository of various experiments / PoC. debugging-secure-kernel: PoC gdb debugging the Windows 10 secure kernel, on top of QEMU KVM dns: Experiments regarding DNS / Certificate transparency / Homoglyphs Attack Surface Reduction: Demystifying Windows Attack Surface Reduction internals...

The vulnerability of the `execve` system call in FreeBSD’s kernel allows a attacker to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the execve system call in FreeBSD operating systems is related to improper verification of removed users. Exploiting this vulnerability can allow an attacker to compromise the confidentiality, integrity, and accessibility of protected information...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: exec: Force a single empty string when argv is empty Quoting 1 Ariadne Conill: “In several other operating systems, it is a hard requirement that the second argument to execve2 be the name of a program. This prevents scenarios...

Linux Distros Unpatched Vulnerability : CVE-2026-89766

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - pidfd: hold execupdatelock around namespace ioctl The PIDFDGETNAMESPACE ioctls in pidfdioctl perform a filesystem credentials ptrace access check before handing...

DEBIAN-CVE-2026-89766

In the Linux kernel, the following vulnerability has been resolved: pidfd: hold execupdatelock around namespace ioctl The PIDFDGETNAMESPACE ioctls in pidfdioctl perform a filesystem credentials ptrace access check before handing out a namespace file descriptor. The accompanying comment states tha...

CVE-2026-89766

In the Linux kernel, the following vulnerability has been resolved: pidfd: hold execupdatelock around namespace ioctl The PIDFDGETNAMESPACE ioctls in pidfdioctl perform a filesystem credentials ptrace access check before handing out a namespace file descriptor. The accompanying comment states tha...

CVE-2026-89766

This Linux kernel vulnerability affects the PIDFD_GET_*_NAMESPACE ioctls in pidfd_ioctl(), which perform a ptrace credentials check before handing out a namespace file descriptor. Unlike the equivalent procfs paths (proc_ns_get_link, proc_ns_readlink), the pidfd path did not hold the target task'...

CVE-2026-19583 Velociraptor Required Permissions bypass by using client monitoring queries

Velociraptor allows some sensitive artifacts to be gated by additional permissions. For example, the Linux.Sys.BashShell artifact allows arbitrary command execution on endpoints, and so it requires the EXECVE permission to schedule. However, no such check was implemented for client monitoring...

PT-2026-89259

Velociraptor allows some sensitive artifacts to be gated by additional permissions. For example, the Linux.Sys.BashShell artifact allows arbitrary command execution on endpoints, and so it requires the EXECVE permission to schedule. However, no such check was implemented for client monitoring...

SUSE CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

UBUNTU-CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408 Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

EUVD-2026-70105

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...