CVE-2021-3489
Published: Jun 4, 2021
Modified: Sep 16, 2024
CVSS v3.1
7.8
Description
The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux kernel | affected trunk - < v5.13-rc4affected linux-5.12.y - < v5.12.4affected linux-5.11.y - < v5.11.21affected linux-5.10.y - < v5.10.37affected v5.8 - < 5.8* |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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