CVE-2021-3996: kernel util-linux +1 lainnya

csirt@kutim:~/threat-intel/cve/CVE-2021-3996

CVSS 5.5 · Medium EPSS 0,63%

Kerentanan Files or Directories Accessible to External Parties pada kernel util-linux, fedoraproject fedora. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.

Rincian

Terbit di NVD: 23 Agustus 2022
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-552: Files or Directories Accessible to External Parties
EPSS (30 hari): 0,63% peluang dieksploitasi; lebih tinggi dari 48,9% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
kernel	util-linux	Versi 2.34 hingga sebelum 2.37.3
fedoraproject	fedora	Versi 35

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/v2.37.3-ReleaseNotes release notes · advisory vendor
https://bugzilla.redhat.com/show_bug.cgi?id=2024628 issue tracking · patch · advisory pihak ketiga
https://github.com/util-linux/util-linux/commit/166e87368ae88bf31112a30e078cceae637f4cdb patch · advisory pihak ketiga
https://www.openwall.com/lists/oss-security/2022/01/24/2 exploit · mailing list · patch · advisory pihak ketiga
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html advisory pihak ketiga
http://seclists.org/fulldisclosure/2022/Dec/4 mailing list · advisory pihak ketiga
http://www.openwall.com/lists/oss-security/2022/11/30/2 mailing list · advisory pihak ketiga
https://access.redhat.com/security/cve/CVE-2021-3996 issue tracking · advisory pihak ketiga
https://security.netapp.com/advisory/ntap-20221209-0002/ broken link · advisory pihak ketiga
https://security.gentoo.org/glsa/202401-08

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.