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Debian: CVE-2023-4623: linux -- security update

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Debian: CVE-2023-4623: linux -- security update

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
09/06/2023
Created
10/24/2023
Added
10/23/2023
Modified
01/30/2025

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.

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2023-4623
  • CVE - 2023-4623
  • DLA-3623-1
  • 查看数 710
  • 已创建
  • 最后回复

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