CVE-2018-5390 (https://nvd.nist.gov/vuln/detail/CVE-2018-5390): Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.
External References: https://access.redhat.com/articles/3553061 https://www.kb.cert.org/vuls/id/962459 https://www.spinics.net/lists/netdev/msg514742.html An upstream fix is a merge commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1a4f14bab1868b443f0dd3c55b689a478f82e72e consisting of the following commits: commit 72cd43ba64fc172a443410ce01645895850844c8 commit f4a3313d8e2ca9fd8d8f45e40a2903ba782607e7 commit 3d4bf93ac12003f9b8e1e2de37fe27983deebdcf commit 8541b21e781a22dce52a74fef0b9bed00404a1cd commit 58152ecbbcc6a0ce7fddd5bf5f6ee535834ece0c
Fixes available in: 4.17: >=sys-kernel/gentoo-sources-4.17.11 4.14: >=sys-kernel/gentoo-sources-4.14.59 4.9: >=sys-kernel/gentoo-sources-4.9.116 4.4: Unaffacted
Stabilization will happen in bug 663016.