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CVE-2023-3611

Public on 2023-07-21
Modified on 2024-01-12
Description

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.

The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks.

We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

Severity
Important
See what this means
CVSS v3 Base Score
7.8
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2023-08-03 20:16 ALAS-2023-1792
Amazon Linux 2 - Core kernel 2023-08-03 18:09 ALAS2-2023-2179
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-08-03 19:42 ALAS2KERNEL-5.10-2023-038
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-08-03 19:42 ALAS2KERNEL-5.15-2023-025
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-08-03 19:42 ALAS2KERNEL-5.4-2023-050
Amazon Linux 2023 kernel 2023-08-17 11:20 ALAS2023-2023-299

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H