userland-exec

Userland Exec Userland exec reemplaza la imagen del proceso existente dentro del espacio de direcciones actual por una nueva. Imita el comportamiento de la llamada al sistema execve, pero las estructuras del proceso que describen la imagen del proceso permanecen sin cambios. En otras palabras, el...

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/...

ulexecve

Inicio Rápido Ejecuta binarios ELF Linux compilados de forma dinámica o estática sin nunca llamar a execve. root@kitploit: cat /bin/echo | ulexecve - hello hello Introducción Esta herramienta en Python se llama ulexecve y significa userland execve. Te ayuda a ejecutar binarios ELF arbitrarios en...

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'...

SLAE

SLAE Securitytube Linux Assembly Expert SLAE SLAE-721 Compilación root@kitploit: + 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...

experiments

Experimentos Repositorio de varios experimentos / PoC. debugging-secure-kernel: PoC de depuración con gdb del kernel seguro de Windows 10, sobre QEMU KVM dns: Experimentos relacionados con DNS / Transparencia de certificados / Homoglifos Reducción de superficie de ataque: Desmitificando los...

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...

Linux_X86_Reverse_TCP_Alphanumeric_Staged_Shellcode_Execve-bin-bash

Este repositorio no tiene un README...

Webmin_Exploit_reverse_shell

Introducción: El Webmin Exploit es un exploit dirigido al servicio Webmin, que puede ser explotado en versiones antiguas de Webmin. Este exploit utiliza diversas técnicas para ejecutar código malicioso y obtener acceso no autorizado al sistema objetivo. Implica: El uso tanto de código C como...

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...

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-2026-58089

When a process calls execve2 to execute a setuid or setgid image, hwpmc4 is supposed to detach PMCs owned by unprivileged processes. An inverted check meant that this scenario was not handled properly. An unprivileged local user who has attached PMCs to a process can continue monitoring it after...

EUVD-2026-66234

When a process calls execve2 to execute a setuid or setgid image, hwpmc4 is supposed to detach PMCs owned by unprivileged processes. An inverted check meant that this scenario was not handled properly. An unprivileged local user who has attached PMCs to a process can continue monitoring it after...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

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...

CVE-2026-49415 Local privilege escalation via execve(2) TOCTOU race

During execve2 of a SUID binary, the new virtual address space is installed before the process credentials are updated. During this window, a process running as the same user can access the target process's memory via procfs or linprocfs, because the kernel's debugging permission check still saw...

CVE-2026-49415

FreeBSD kernel is affected by a TOCTOU race in execve(2): when executing a SUID binary, the new address space is installed before credentials are updated, so a same-user process can read or modify memory via procfs/linprocfs during the window. An unprivileged local user can exploit this to gain r...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100573)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100573 advisory. In the Linux kernel, the following vulnerability has been resolved: signal: clear JOBCTLPENDINGMASK for caller in zapotherthreads When a multi-threaded process...

CVE-2026-74486

The CVE-2026-74486 entry describes a Linux kernel vulnerability in binfmt_misc where load_misc_binary() clones the interpreter file and denies write access with exe_file_deny_write_access(), while the exec path later calls exe_file_allow_write_access(). This mismatch can cause repeated write-deni...

DEBIAN-CVE-2026-68186

In the Linux kernel, the following vulnerability has been resolved: binfmtmisc: set haveexecfd only once the interpreter is opened loadmiscbinary raises bprm-haveexecfd as soon as it sees the 'O' or 'C' flag. This happens well before it opens the interpreter. If that open fails the flag stays set...

UBUNTU-CVE-2026-68187

In the Linux kernel, the following vulnerability has been resolved: exec: fix unsigned loop counter wrap in transferargstostack The stop value is derived from bprm-p PAGESHIFT. The index variable is an unsigned long. If bprm-p drops below PAGESIZE and stop becomes zero the loop condition index =...