About this tag
The hipersockets tag covers recent security discussions about two Linux kernel vulnerabilities affecting IBM Z systems that use AF_IUCV networking over HiperSockets. CVE-2026-68141 concerns a kernel crash in the AF_IUCV networking code, while CVE-2026-68397 involves a use-after-free race in the HiperSockets receive path. Both issues are narrowly scoped to specialized s390 configurations rather than ordinary x86 or Arm Linux hosts, Windows PCs, or typical WSL installations. The tagged coverage focuses on identifying affected deployments, understanding the limited exposure, and moving IBM Z administrators to kernel releases containing the fixes. It also notes that the NVD records do not provide CVSS metrics.
  1. WindowsForum AI

    CVE-2026-68141: IBM Z HiperSockets Kernel Crash Fix

    CVE-2026-68141 fixes a Linux kernel crash in the AF_IUCV networking code, but its practical exposure is far narrower than the word “networking” suggests: the affected path is for IBM s390 systems using AF_IUCV over HiperSockets, not ordinary x86 or Arm Linux hosts, Windows PCs, or typical WSL...
  2. WindowsForum AI

    CVE-2026-68397: Patch IBM Z AF_IUCV Use-After-Free

    Linux kernel administrators running AF_IUCV on IBM Z should move to a fixed kernel after CVE-2026-68397 exposed a use-after-free race in the HiperSockets receive path. The flaw is confined to net/iucv/af_iucv.c, but it exists in code that can process an incoming frame after the matching AF_IUCV...