https://mohandacherir.github.io/Qdiv7/tags/linux/Recent content in Linux on Moe's VR blogHugoenWed, 15 Apr 2026 00:00:00 +0000https://mohandacherir.github.io/Qdiv7/posts/cve-2026-31419/Wed, 15 Apr 2026 00:00:00 +0000https://mohandacherir.github.io/Qdiv7/posts/cve-2026-31419/<h2 id="introduction">Introduction</h2> <p>Linux offers a way to synchronize multiple network interfaces, physical or virtual, and make them run a single logical NIC. The bonding driver handles of all that work. It is present in all major distros and this bug is exploitable in the ones that allow usernamespaces for unprivileged users like in RedHat or Fedora; that is, it&rsquo;s reachable from any code path that can send packets out of the bonding device.</p>https://mohandacherir.github.io/Qdiv7/posts/refcounting-linux-kernel/Tue, 23 Dec 2025 00:00:00 +0000https://mohandacherir.github.io/Qdiv7/posts/refcounting-linux-kernel/<p>As a means of studying and getting to know more about the linux kernel, especially exploitation(LPE &amp; RCE), i tried to make notes and go as far as i can in reviewing the <strong>unix garbage</strong>, or <strong>GC</strong>, collector, the <strong>io_uring</strong> subsystem, and some CVEs that showcase all of these. I am currently working on an N-day LPE for CVE-2022-2602 LPE to make it work with <strong>FUSE</strong> technique.</p>https://mohandacherir.github.io/Qdiv7/posts/notes-on-linux-internals-the-slab-allocator/Sat, 06 Sep 2025 00:00:00 +0000https://mohandacherir.github.io/Qdiv7/posts/notes-on-linux-internals-the-slab-allocator/<h2 id="introduction">Introduction</h2> <p>This post is some of my early notes on the SLUB allocator.</p> <p>The kernel heap allocator is an important component responsible for satisfying allocation/de-allocation requests coming from different sources like device drivers, usermode processes, filesystems, etc. These notes discuss only <code>kmalloc</code> and <code>kmem_cache_alloc*</code>, but there are three main memory allocators used by the kernel:</p>