how2heap

Educational Heap Exploitation This repo is for learning various heap exploitation techniques. We use Ubuntu's Libc releases as the gold-standard. Each technique is verified to work on corresponding Ubuntu releases. You can run apt source libc6 to download the source code of the Libc you are using...

CVE-2026-88341

A flaw was found in YARA. A remote attacker could exploit this vulnerability by providing a specially crafted compiled rule file .yrc with an invalid arena configuration. This malicious file, when loaded, triggers an assertion failure, leading to the application's termination. This results in a...

red-teaming-auto-mode

Red-teaming auto mode Code for the auto-mode monitor red-teaming paper, in two trees: alex/ — the simulation eval, the fuzzing code investigatorsolver, and the monitor implementations Claude Code auto mode, Codex guardian. simon/ — the arena evals. Depends on the monitor implementations in alex/...

Linux Distros Unpatched Vulnerability : CVE-2026-93044

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - bpf: Disallow interpreter fallback for arena-related insns Since the interpreter does not support the arena-related insns, interpreter fallback should not be...

Linux Distros Unpatched Vulnerability : CVE-2026-93045

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs...

Linux Distros Unpatched Vulnerability : CVE-2026-90211

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - bpf, s390: Clear fetch destination on faulting arena atomic Same missing register clear as on riscv64. A RMW atomic on an arena pointer is converted to...

DEBIAN-CVE-2026-93045

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range t...

CVE-2026-93045

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range t...

DEBIAN-CVE-2026-90342

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix mmaplock deadlock on arena lock failure Reported by the Sashiko AI review. arenavmfault returns VMFAULTRETRY when it can't take arena-spinlock, but it never took mmaplock. The fault path assumes a VMFAULTRETRY handler...

DEBIAN-CVE-2026-90211

In the Linux kernel, the following vulnerability has been resolved: bpf, s390: Clear fetch destination on faulting arena atomic Same missing register clear as on riscv64. A RMW atomic on an arena pointer is converted to BPFPROBEATOMIC and gets an exception table entry, but bpfjitprobeatomicpre on...

CVE-2026-90211

In the Linux kernel, the following vulnerability has been resolved: bpf, s390: Clear fetch destination on faulting arena atomic Same missing register clear as on riscv64. A RMW atomic on an arena pointer is converted to BPFPROBEATOMIC and gets an exception table entry, but bpfjitprobeatomicpre on...

CVE-2026-93045

CVE-2026-93045 affects the Linux kernel BPF arena subsystem. The vulnerability resides in bpf_arena_free_pages() , which accepts scalar arena addresses and masks them to the low 32 bits before reconstructing a full user address. When the scalar value is below the low 32 bits of the arena base, th...

CVE-2026-93044

CVE-2026-93044 affects the Linux kernel BPF subsystem. The BPF interpreter does not support arena-related instructions (ST/LDX/STX). When a BPF program using an arena map falls back to the interpreter (via core.c::__bpf_prog_select_runtime()), execution hits a BUG_ON() at kernel/bpf/core.c:2349, ...

EUVD-2026-82155

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range t...

EUVD-2026-82154

In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow interpreter fallback for arena-related insns Since the interpreter does not support the arena-related insns, interpreter fallback should not be allowed for these insns in core.c::bpfprogselectruntime. Currently, whe...

CVE-2026-93044 bpf: Disallow interpreter fallback for arena-related insns

In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow interpreter fallback for arena-related insns Since the interpreter does not support the arena-related insns, interpreter fallback should not be allowed for these insns in core.c::bpfprogselectruntime. Currently, whe...

CVE-2026-93045 bpf: Reject arena frees below the arena base

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject arena frees below the arena base bpfarenafreepages accepts scalar arena addresses. The runtime masks the address to the low 32 bits and reconstructs a full user address from the arena base before returning the range t...

CVE-2026-92517

CVE-2026-92517 affects the Linux kernel on RISC-V , specifically in the BPF arena load_acquire path. The root cause is in emit_atomic_ld_st(), which returns a non-zero value (1) to signal that build_body() should skip a zero-extension step. Because the caller uses ret = ret ?: add_exception_handl...

CVE-2026-92517 bpf, riscv: Fix extable handling for arena load_acquire

In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena loadacquire emitatomicldst returns 1 to have buildbody skip the zext after a sub-word loadacquire. The caller does "ret = ret ?: addexceptionhandler...", which skips addexceptionhandler ...

EUVD-2026-82138

In the Linux kernel, the following vulnerability has been resolved: bpf, riscv: Fix extable handling for arena loadacquire emitatomicldst returns 1 to have buildbody skip the zext after a sub-word loadacquire. The caller does "ret = ret ?: addexceptionhandler...", which skips addexceptionhandler ...