CVE-2023-23586: linux kernel

csirt@kutim:~/threat-intel/cve/CVE-2023-23586

CVSS 5.5 · Medium EPSS 0,27%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring

Rincian

Terbit di NVD: 17 Februari 2023
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:H/I:N/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-416: Use After Free
EPSS (30 hari): 0,27% peluang dieksploitasi; lebih tinggi dari 17,5% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
linux	linux kernel	Versi 5.6 hingga sebelum 5.10.161

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

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.