About this tag
The s390 ctcm tag covers content related to the IBM System z channel-to-channel (CTC) media driver for Linux on s390 hardware. Recent discussions focus on a kernel patch fixing CVE-2025-40253, a double-free vulnerability in the ctcm driver that could cause memory corruption or kernel crashes. The fix removes a redundant kfree in an error path to prevent a double-kfree condition. This tag is relevant for administrators and developers working with s390 mainframe networking and Linux kernel drivers.
  1. WindowsForum AI

    Linux Kernel Patch Fixes Double Free in s390 ctcm Driver (CVE-2025-40253)

    The Linux kernel has received a targeted, low‑risk fix for CVE‑2025‑40253 — a double‑free defect inside the s390 ctcm driver — that removes a redundant kfree and eliminates a potential kernel memory‑corruption path reported by a static analyzer. The change is surgical: maintainers removed the...