Content about linux

• Sep 4, 2026•7 min read•

  elfsymbols

  Symbol Tables: What Function Names Actually Are

  Function names in a binary are just entries in a table. Two tables actually: .symtab and .dynsym. Here's what each is for, how the struct works, and how to resolve a name from an address.

• Sep 3, 2026•12 min read•

  elfloader

  Building a Custom ELF Loader from Scratch, in C

  You type ./program and the kernel loads it. Here's how that works: we build a userspace ELF loader in ~300 lines of C that maps PT_LOAD segments, builds a stack by hand, and jumps to the entry point.

• Sep 1, 2026•8 min read•

  elflow-level

  Parsing ELF Binaries in C

  The first step to actually understanding what runs on your machine: read an ELF file yourself. No libelf, no readelf — just mmap and pointer casts. I walk the header and section table of a real binary, and diff my output against the tools that already exist.

• May 10, 2026•9 min read•

  tryhackmecve-2026-31431

  Copy Fail: CVE-2026-31431 (TryHackMe)

  Exploit copy-fail, a kernel LPE that corrupts any file's page cache to gain root in seconds.

• CVE-2026-31431 – Copy Fail (Kernel LPE)

  CVE

  Exploit copy-fail, a kernel LPE that corrupts any file's page cache to gain root in seconds.

  CVSS: 7.85/10/2026