Linux Kernel EUVD-2026-27720

The primary fix is to upgrade to a patched Linux kernel version: 6.1.165 or later in the 6.1 stable series, 6.6.128 or later in the 6.6 series, 6.12.75 or later in the 6.12 series, 6.18.16 or later in the 6.18 series, 6.19.6 or later in the 6.19 series, or 7.0 for mainline. Fix commits are available at https://git.kernel.org/stable/c/ccef79af58b43787c25710c9da96651c6ddfe50f and the other stable-branch commits referenced in the CVE. For Red Hat and SUSE enterprise users, apply the relevant vendor kernel errata when published. As a compensating control on non-patchable systems, avoid frequent unbind/rebind cycles of the octeontx2-af driver (e.g., disable automated driver restart scripts or hot-plug testing on OcteonTX2 NICs); this limits leak accumulation without eliminating it. Systems can be monitored for the leak using CONFIG_DEBUG_KMEMLEAK kernel debug builds, though this is not a production control. No workaround eliminates the leak without a kernel patch.