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Home CVE Database CVE-2023-4208

CVE-2023-4208

Description

A use-after-free vulnerability in the Linux kernel\'s net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.

Priority: --
CVSS v3: 7.8
Component: linux
Publish Date: Sep 6, 2023
Related ID: --
CVSS v2: HIGH
Modified Date: Sep 7, 2023

Find out more about CVE-2023-4208 from the MITRE-CVE dictionary and NIST NVD


Products Affected

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Product Name Status Defect Fixed Downloads
Linux
Wind River Linux LTS 17 Requires LTSS -- -- --
Wind River Linux 8 Requires LTSS -- -- --
Wind River Linux 9 Requires LTSS -- -- --
Wind River Linux 7 Requires LTSS -- -- --
Wind River Linux LTS 21 Fixed LIN1021-6497
10.21.20.20 --
Wind River Linux LTS 22 Fixed LIN1022-5345
10.22.33.12 --
Wind River Linux LTS 18 Fixed LIN1018-11228
10.18.44.30 --
Wind River Linux LTS 19 Fixed LIN1019-10371
10.19.45.30 --
Wind River Linux CD release N/A -- -- --
Wind River Linux 6 Requires LTSS -- -- --
Wind River Linux LTS 23 Fixed LIN1023-2038
10.23.30.2 --
Wind River Linux LTS 24 Fixed -- LINCD-next --
VxWorks
VxWorks 7 Not Vulnerable -- -- --
VxWorks 6.9 Not Vulnerable -- -- --
Helix Virtualization Platform Cert Edition
Helix Virtualization Platform Cert Edition Not Vulnerable -- -- --
eLxr
eLxr 12 Fixed -- 6.1.52-1 --
Wind River Studio Cloud Platform

Related Products

Product Name Status Defect Fixed Downloads

Notes
Requires LTSS - customers must have active LTSS (Long Term Security Shield) Support to receive up-to-date information about vulnerabilities that may affect legacy software. Please contact your Wind River account team or see https://docs.windriver.com/bundle/Support_and_Maintenance_Supplemental_Terms_and_Conditions and https://support2.windriver.com/index.php?page=plc for more information.
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