Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-3489

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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 26.4%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 7.2
Products affected by CVE-2021-3489


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