Wind River Support Network

HomeDefectsLIN1018-11231
Fixed

LIN1018-11231 : Security Advisory - linux - CVE-2023-4623

Created: Sep 6, 2023    Updated: Oct 13, 2023
Resolved Date: Oct 13, 2023
Found In Version: 10.18.44.1
Fix Version: 10.18.44.30
Severity: Standard
Applicable for: Wind River Linux LTS 18
Component/s: Kernel

Description

A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation.

If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free.

We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.

CREATE(Triage):(User=admin) CVE-2023-4623 (https://nvd.nist.gov/vuln/detail/CVE-2023-4623)

CVEs


Live chat
Online