CVE-2025-21786: linux kernel

csirt@kutim:~/threat-intel/cve/CVE-2025-21786

CVSS 7.8 · High EPSS 0,23%

Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut CISA ADP.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: workqueue: Put the pwq after detaching the rescuer from the pool The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), which caused a use-after-free bug reported by Cheung Wall. To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.

Rincian

Terbit di NVD: 27 Februari 2025
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 7.8 (High), sumber CISA ADP
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-416: Use After Free
EPSS (30 hari): 0,23% peluang dieksploitasi; lebih tinggi dari 13,0% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
linux	linux kernel	Semua versi sebelum 6.12.16
linux	linux kernel	Versi 6.13 hingga sebelum 6.13.4

> 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, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.