CVE-2025-21703

Katalog CVE

CVSS 7.8 · High EPSS 0,30%

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

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: netem: Update sch->q.qlen before qdisc_tree_reduce_backlog() qdisc_tree_reduce_backlog() notifies parent qdisc only if child qdisc becomes empty, therefore we need to reduce the backlog of the child qdisc before calling it. Otherwise it would miss the opportunity to call cops->qlen_notify(), in the case of DRR, it resulted in UAF since DRR uses ->qlen_notify() to maintain its active list.

Rincian

Terbit di NVD

18 Februari 2025

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber CNA
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)

0,30% peluang dieksploitasi; lebih tinggi dari 20,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/1f8e3f4a4b8b90ad274dfbc66fc7d55cb582f4d5 patch
• https://git.kernel.org/stable/c/6312555249082d6d8cc5321ff725df05482d8b83 patch
• https://git.kernel.org/stable/c/638ba5089324796c2ee49af10427459c2de35f71 patch
• https://git.kernel.org/stable/c/7b79ca9a1de6a428d486ff52fb3d602321c08f55 patch
• https://git.kernel.org/stable/c/7f31d74fcc556a9166b1bb20515542de7bb939d1 patch
• https://git.kernel.org/stable/c/839ecc583fa00fab785fde1c85a326743657fd32 patch
• https://git.kernel.org/stable/c/98a2c685293aae122f688cde11d9334dddc5d207 patch
• https://git.kernel.org/stable/c/e395fec75ac2dbffc99b4bce57b7f1f3c5449f2c patch
• https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html