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cpu hotplug

About this tag
The cpu hotplug tag on WindowsForum.com covers Linux kernel vulnerabilities and fixes related to CPU hotplug operations. Discussions include CVE-2024-35801, which involves a per-CPU state mismatch causing a machine-check crash during XRSTOR; CVE-2025-40194, an intel_pstate driver bug that could crash during CPU hot removal; and CVE-2025-21693, a use-after-free in zswap triggered by CPU hot-unplug. These threads focus on kernel stability, security patches, and the technical details of per-CPU resource management during hotplug events. The content is relevant for Linux system administrators, kernel developers, and IT professionals managing systems that use CPU hotplug features.
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    CVE-2026-53314: Microsoft Security Update Guide Maps a Linux Kernel padata Hotplug Bug

    CVE-2026-53314 is a Linux kernel vulnerability entry tied to the padata subsystem’s CPU hotplug handling, surfaced through Microsoft’s Security Update Guide on June 28, 2026, while the public MSRC page was intermittently unavailable or returning maintenance and error messages. That combination...
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    • cpu hotplug cve-2026-53314 linux kernel vulnerability management
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2024-35801: Linux kernel fix for XRSTOR #NM xfd_state mismatch

    The Linux kernel bug tracked as CVE-2024-35801 creates a mismatch between a cached per‑CPU state (xfd_state) and the processor model-specific register MSR_IA32_XFD, allowing normal FP/SIMD context-management operations to trigger a machine‑check (#NM) during XRSTOR and crash the kernel —...
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    Linux Kernel CVE-2025-40194 Intel pstate fix reduces hotplug crash risk

    A recently disclosed Linux kernel defect, tracked as CVE‑2025‑40194, fixes an object lifecycle bug in the intel_pstate CPU frequency driver that could — under narrow and largely virtualized scenarios — cause a kernel crash during CPU device hot removal; vendors and the kernel stable trees have...
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    • cpu hotplug intel pstate linux kernel stable backport
    • Replies: 0
    • Forum: Security Alerts
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    Linux zswap UAF CVE-2025-21693: CPU hotplug fix with mutex

    The Linux kernel has a newly cataloged use‑after‑free in the zswap compression path—tracked as CVE‑2025‑21693—that can be triggered when a CPU is hot‑unplugged while compression or decompression is still using per‑CPU resources, allowing those resources to be freed under active use and producing...
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