CVE-2021-3489

Katalog CVE

CVSS 7.8 · High EPSS 0,55%

Kerentanan Improper Restriction of Operations within the Bounds of a Memory Buffer pada linux kernel, canonical ubuntu linux. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

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).

Rincian

Terbit di NVD

4 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,55% peluang dieksploitasi; lebih tinggi dari 44,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6e... patch · advisory vendor
• https://security.netapp.com/advisory/ntap-20210716-0004/ advisory pihak ketiga
• https://ubuntu.com/security/notices/USN-4949-1 advisory pihak ketiga
• https://ubuntu.com/security/notices/USN-4950-1 advisory pihak ketiga
• https://www.openwall.com/lists/oss-security/2021/05/11/10 mailing list · advisory pihak ketiga
• https://www.zerodayinitiative.com/advisories/ZDI-21-590/ advisory pihak ketiga · vdb entry