defcon27_csharp_workshop

This repository contains a collection of C code snippets and labs for writing custom backdoor payloads, as part of a workshop presented at Defcon 27. The code covers various topics, including Windows API calls, memory allocation, thread creation, and encryption. The code snippets are organized in...

Linux Distros Unpatched Vulnerability : CVE-2025-39756

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fs: Prevent file descriptor table allocations exceeding INTMAX When sysctlnropen is set to a very high value for example, 1073741816 as set by systemd, process...

Linux Distros Unpatched Vulnerability : CVE-2025-39789

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary. CVE-2025-39789 No...

CLSA-2025-1757692387 lldpd: Fix of CVE-2020-27827

CVE-2020-27827: fix memory allocation issue caused by specially crafted LLDP packets...

SUSE CVE-2025-39747

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Add error handling for krealloc in metadata setup Function msmioctlgeminfosetmetadata now checks for krealloc failure and returns -ENOMEM, avoiding potential NULL pointer dereference. Explicitly avoids GFPNOFAIL due to...

CVE-2025-39789

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

CVE-2025-39789

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

DEBIAN-CVE-2025-39789

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

DEBIAN-CVE-2025-39758

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix the sendmsg byte count in siwtcpsendpages Ever since commit c2ff29e99a76 "siw: Inline dotcpsendpages", we have been doing this: static int siwtcpsendpagesstruct socket s, struct page page, int offset, sizet size ......

CVE-2025-39756

In the Linux kernel, the following vulnerability has been resolved: fs: Prevent file descriptor table allocations exceeding INTMAX When sysctlnropen is set to a very high value for example, 1073741816 as set by systemd, processes attempting to use file descriptors near the limit can trigger massi...

DEBIAN-CVE-2025-39756

In the Linux kernel, the following vulnerability has been resolved: fs: Prevent file descriptor table allocations exceeding INTMAX When sysctlnropen is set to a very high value for example, 1073741816 as set by systemd, processes attempting to use file descriptors near the limit can trigger massi...

DEBIAN-CVE-2025-39747

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Add error handling for krealloc in metadata setup Function msmioctlgeminfosetmetadata now checks for krealloc failure and returns -ENOMEM, avoiding potential NULL pointer dereference. Explicitly avoids GFPNOFAIL due to...

UBUNTU-CVE-2025-39789

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

UBUNTU-CVE-2025-39747

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Add error handling for krealloc in metadata setup Function msmioctlgeminfosetmetadata now checks for krealloc failure and returns -ENOMEM, avoiding potential NULL pointer dereference. Explicitly avoids GFPNOFAIL due to...

UBUNTU-CVE-2025-39756

In the Linux kernel, the following vulnerability has been resolved: fs: Prevent file descriptor table allocations exceeding INTMAX When sysctlnropen is set to a very high value for example, 1073741816 as set by systemd, processes attempting to use file descriptors near the limit can trigger massi...

CVE-2025-39789 crypto: x86/aegis - Add missing error checks

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

CVE-2025-39789 crypto: x86/aegis - Add missing error checks

In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipherwalk functions can allocate memory and can fail, so checking for errors is necessary...

CVE-2025-39756 fs: Prevent file descriptor table allocations exceeding INT_MAX

In the Linux kernel, the following vulnerability has been resolved: fs: Prevent file descriptor table allocations exceeding INTMAX When sysctlnropen is set to a very high value for example, 1073741816 as set by systemd, processes attempting to use file descriptors near the limit can trigger massi...

CVE-2025-39756

CVE-2025-39756 is a Linux kernel issue where extremely high nr_open values (e.g., 1073741816) can trigger massive file descriptor table allocations that exceed INT_MAX, causing a kernel warning and impractical memory requests (>8GB) during operations near the FD limit. The root cause involves ...

CVE-2025-39747 drm/msm: Add error handling for krealloc in metadata setup

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Add error handling for krealloc in metadata setup Function msmioctlgeminfosetmetadata now checks for krealloc failure and returns -ENOMEM, avoiding potential NULL pointer dereference. Explicitly avoids GFPNOFAIL due to...