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s390 ctcm
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.
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...