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SUSE-SU-2023:4164-1

Опубликовано: 24 окт. 2023
Источник: suse-cvrf

Описание

Security update for the Linux Kernel RT (Live Patch 5 for SLE 15 SP5)

This update for the Linux Kernel 5.14.21-150500_13_18 fixes one issue.

The following security issue was fixed:

  • CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215440).

Список пакетов

SUSE Linux Enterprise Live Patching 15 SP4
kernel-livepatch-5_14_21-150400_15_53-rt-2-150400.2.1
SUSE Linux Enterprise Live Patching 15 SP5
kernel-livepatch-5_14_21-150500_13_18-rt-2-150500.2.1

Ссылки

Описание

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.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP4:kernel-livepatch-5_14_21-150400_15_53-rt-2-150400.2.1
SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_18-rt-2-150500.2.1
Ссылки