CVE-2021-4159 - CVE House
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Status published Medium CVE-2021-4159

A vulnerability was found in the Linux kernel's EBPF verifier...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

kernel
Vulnerable Versions:
Fixed in v5.7-rc1

Timeline

Official Publish: August 24th, 2022
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-202

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.