A flaw was found in the way the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem handled changing of classification filters leading to user-after-free condition. An unprivileged local user could use this flaw to escalate their privileges on the system. Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef299cc3fa1a9e1288665a9fdc8bff55629fd359
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:3442 https://access.redhat.com/errata/RHSA-2021:3442
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:3439 https://access.redhat.com/errata/RHSA-2021:3439
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:3443 https://access.redhat.com/errata/RHSA-2021:3443
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:3445 https://access.redhat.com/errata/RHSA-2021:3445
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:3444 https://access.redhat.com/errata/RHSA-2021:3444
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:3441 https://access.redhat.com/errata/RHSA-2021:3441
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:3438 https://access.redhat.com/errata/RHSA-2021:3438
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:3446 https://access.redhat.com/errata/RHSA-2021:3446
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-3715
This issue has been addressed in the following products: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 Via RHSA-2021:3477 https://access.redhat.com/errata/RHSA-2021:3477
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions Via RHSA-2022:7173 https://access.redhat.com/errata/RHSA-2022:7173