Huawei EulerOS: CVE-2023-4207: kernel security update
Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. When fw_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 76e42ae831991c828cffa8c37736ebfb831ad5ec.
Solution(s)
- huawei-euleros-2_0_sp10-upgrade-kernel
- huawei-euleros-2_0_sp10-upgrade-kernel-abi-stablelists
- huawei-euleros-2_0_sp10-upgrade-kernel-tools
- huawei-euleros-2_0_sp10-upgrade-kernel-tools-libs
- huawei-euleros-2_0_sp10-upgrade-python3-perf
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