CVE-2021-3444

Katalog CVE

CVSS 7.8 · High EPSS 0,61%

Kerentanan Incorrect Conversion between Numeric Types pada linux kernel, debian linux +1 lainnya. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

Rincian

Terbit di NVD

23 Maret 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-681: Incorrect Conversion between Numeric Types
CWE-125: Out-of-bounds Read

EPSS (30 hari)

0,61% peluang dieksploitasi; lebih tinggi dari 47,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809 mailing list · patch · advisory vendor
• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html advisory pihak ketiga · vdb entry
• http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html advisory pihak ketiga · vdb entry
• http://www.openwall.com/lists/oss-security/2021/03/23/2 mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html mailing list · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210416-0006/ advisory pihak ketiga
• https://www.openwall.com/lists/oss-security/2021/03/23/2 mailing list · advisory pihak ketiga