CVE-2021-3490: linux kernel +1 lainnya

csirt@kutim:~/threat-intel/cve/CVE-2021-3490

CVSS 7.8 · High EPSS 27,2%

Kerentanan Improper Input Validation pada linux kernel, canonical ubuntu linux. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-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-20: Improper Input Validation
CWE-787: Out-of-bounds Write
CWE-125: Out-of-bounds Read
EPSS (30 hari): 27,2% peluang dieksploitasi; lebih tinggi dari 98,0% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
linux	linux kernel	Versi 5.10 hingga sebelum 5.10.37
linux	linux kernel	Versi 5.11 hingga sebelum 5.11.21
linux	linux kernel	Versi 5.12 hingga sebelum 5.12.4
linux	linux kernel	Versi 5.13
linux	linux kernel	Versi 5.13 rc1
linux	linux kernel	Versi 5.13 rc2
linux	linux kernel	Versi 5.13 rc3
canonical	ubuntu linux	Versi 20.04
canonical	ubuntu linux	Versi 20.10
canonical	ubuntu linux	Versi 21.04

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80... patch · advisory vendor
https://www.openwall.com/lists/oss-security/2021/05/11/11 mailing list · patch · advisory pihak ketiga
http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Es... exploit · advisory pihak ketiga · vdb entry
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.zerodayinitiative.com/advisories/ZDI-21-606/ advisory pihak ketiga · vdb entry

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.