CVE-2020-27170

Katalog CVE

CVSS 4.7 · Medium EPSS 0,57%

Kerentanan Observable Discrepancy pada linux kernel, fedoraproject fedora +2 lainnya. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

Rincian

Terbit di NVD

20 Maret 2021

Terakhir diubah

8 Oktober 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-203: Observable Discrepancy

EPSS (30 hari)

0,57% peluang dieksploitasi; lebih tinggi dari 45,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8 patch · advisory vendor
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5... patch · advisory vendor
• https://www.openwall.com/lists/oss-security/2021/03/19/2 mailing list · patch · advisory pihak ketiga
• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html advisory pihak ketiga · vdb entry
• http://www.openwall.com/lists/oss-security/2021/03/24/4 mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html mailing list · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FB6LUXPEIRLZH...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRTPQE73ANG7D...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQ...