Is there a public exploit for CVE-2021-4159?

No public exploit for CVE-2021-4159 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

What does CVE-2021-4159 affect?

CVE-2021-4159 affects n/a Kernel.

— Unscored

A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures.

CVE-2021-4159

A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.

Assessment

CVSS: Not yet scored
Severity: Unscored
EPSS: 0.25% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 24 August 2022
Last updated: 2 November 2026
Affected: n/a · Kernel
Assigner: redhat

At the source

EUVD (ENISA)

References

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