The inet_csk_clone_lock function in net/ipv4/inet_connection_sock.c in the Linux kernel allows attackers to cause a denial of service (double free) or possibly have unspecified other impact by leveraging use of the accept system call. References: https://2freeman.github.io/2018/01/06/CVE-2017-8890-internals.html Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=657831ffc38e30092a2d5f03d385d710eb88b09a https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8b485ce69876c65db12ed390e7f9c0d2a64eff2c
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1450973]
Statement: This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates of this product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 may address this issue.
kernel-4.11.3-200.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
kernel-4.11.4-100.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
This issue has been addressed in the following products: Red Hat Enterprise MRG 2 Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669
This was fixed for Fedora with 4.12 kernel updates.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854