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CVE-2022-25265 is an executable-space-protection bypass in Linux kernels through 5.16.10. When executing certain 32-bit ELF binaries on x86_64, the kernel can assign executable permissions broadly if the binary lacks the PT_GNU_STACK program header. Legacy binaries built with older toolchains, or intentionally crafted binaries whose ELF metadata omits PT_GNU_STACK, can therefore execute instructions from memory regions expected to be non-executable.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept (POC) exploit for CVE-2022-25265, demonstrating a bypass of executable-space protection (NX) on Linux systems. The exploit is implemented in a single C file (demo.c), which, when compiled with an old toolchain (e.g., gcc 3.2.2 on Slackware9), produces a binary lacking the PT_GNU_STACK header. Such binaries are marked as 'exec-all', allowing code execution from data regions (RWX). The POC copies the opcodes of a function (dummy()) into a character buffer and then executes the buffer as code, printing 'noexec bypassed!' to stdout. The repository is structured simply, with a license, a README explaining the vulnerability and build instructions, and the demo C code. No network or remote attack vectors are present; exploitation is local and requires the ability to run custom binaries on the target system.
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6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Bypass of executable-space protection in the Linux kernel.
Linux kernel executable-space-protection bypass.
Linux kernel executable-space protection bypass.
An executable-space-protection bypass in the Linux kernel through version 5.16.10. Legacy binaries may receive the exec-all attribute, permitting execution of bytes in file regions that should be non-executable.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.