A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28. References: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://kernel.dance/#8c710f75256bb3cf05ac7b1672c82b92c43f3d28
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions Via RHSA-2023:4516 https://access.redhat.com/errata/RHSA-2023:4516
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions Via RHSA-2023:4515 https://access.redhat.com/errata/RHSA-2023:4515
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:4541 https://access.redhat.com/errata/RHSA-2023:4541
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:4517 https://access.redhat.com/errata/RHSA-2023:4517
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:4531 https://access.redhat.com/errata/RHSA-2023:4531
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2023:4789 https://access.redhat.com/errata/RHSA-2023:4789
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2023:4888 https://access.redhat.com/errata/RHSA-2023:4888
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat Enterprise Linux 8.4 Telecommunications Update Service Via RHSA-2023:4961 https://access.redhat.com/errata/RHSA-2023:4961
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat Enterprise Linux 8.4 Telecommunications Update Service Via RHSA-2023:4962 https://access.redhat.com/errata/RHSA-2023:4962
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Via RHSA-2023:4967 https://access.redhat.com/errata/RHSA-2023:4967
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Via RHSA-2023:7417 https://access.redhat.com/errata/RHSA-2023:7417
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Telecommunications Update Service Via RHSA-2023:7431 https://access.redhat.com/errata/RHSA-2023:7431
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Red Hat Enterprise Linux 8.2 Telecommunications Update Service Via RHSA-2023:7434 https://access.redhat.com/errata/RHSA-2023:7434