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CVE-2021-4204 is an improper-input-validation vulnerability in the Linux kernel eBPF subsystem that causes an out-of-bounds memory-access condition. A local attacker holding the required special privilege can trigger the flaw, potentially causing a system crash or disclosing internal kernel information.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a local privilege escalation exploit for CVE-2021-4204, a vulnerability in the Linux kernel's eBPF subsystem. The main exploit logic resides in 'exploit.c', which orchestrates a multi-phase attack: creating eBPF maps, corrupting ring buffers, spawning multiple processes, locating and overwriting the current process's credentials in kernel memory, and finally spawning a root shell. The exploit is automated via 'build_and_run.sh', which compiles the code and repeatedly runs the exploit until successful. The supporting header files provide eBPF instruction definitions, configuration constants, debugging macros, and helper functions. The exploit requires local access and the ability to load eBPF programs. If successful, it provides a root shell to the attacker. The repository is well-structured for research and educational purposes, with clear build instructions and verbose output for each exploitation phase.
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10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity local out-of-bounds memory-access vulnerability in the Linux kernel eBPF implementation caused by improper input validation. A locally privileged attacker can crash the affected system or disclose internal information.
Linux kernel improper-input-validation flaw that may allow privilege escalation.
Linux kernel improper-input-validation flaw that may allow privilege escalation.
Linux kernel improper-input-validation flaw that may permit privilege escalation.
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.