CVE-2023-4921

Katalog CVE

CVSS 7.8 · High EPSS 0,42%

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

Deskripsi (NVD)

A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue(). We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.

Rincian

Terbit di NVD

12 September 2023

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-416: Use After Free

EPSS (30 hari)

0,42% peluang dieksploitasi; lebih tinggi dari 34,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da... exploit · mailing list · patch · advisory vendor
• https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8 exploit · patch · advisory vendor
• https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html mailing list · advisory pihak ketiga