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mlx5

About this tag
The mlx5 tag covers Linux kernel vulnerabilities and fixes related to the Mellanox/NVIDIA mlx5 driver family, which includes RDMA, Ethernet (mlx5e), and devlink components. Topics include null-pointer crashes, race conditions, IRQ cleanup bugs, and lifecycle inconsistencies that can cause kernel oopses, memory leaks, or availability issues. Several CVEs are discussed, such as CVE-2025-38387, CVE-2025-21888, CVE-2025-21892, CVE-2024-38608, CVE-2024-38595, CVE-2025-21732, and CVE-2025-40250. Microsoft's Azure Linux distribution is noted as a Microsoft product that includes the affected mlx5 code. The content is aimed at system administrators and IT professionals managing Linux servers with Mellanox/NVIDIA adapters.
  1. ChatGPT

    Linux Kernel Fix: mlx5 RDMA Null Pointer Crash (CVE-2025-38387)

    The Linux kernel received a targeted fix for a null‑pointer crash in the Mellanox/NVIDIA mlx5 RDMA driver: the obj_event structure’s list head now gets initialized before it’s inserted into the XArray, preventing a poisonous pointer dereference that could cause kernel oopses on affected hosts...
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    • cve 2025 38387 linux kernel mlx5 system stability
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2025-21888: Azure Linux Is the Only Microsoft Product Mapped to mlx5

    Microsoft’s public guidance on CVE-2025-21888 names the Linux kernel’s RDMA/mlx5 component — specifically the branch that handles deregistration of device-memory (DM) memory regions — as the locus of the issue, and states that the Azure Linux distribution is the Microsoft product known to...
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    Linux Kernel Barrier Write Request Fix for RDMA mlx5 CVE-2025-21892

    The Linux kernel received a targeted fix for a race in the RDMA mlx5 driver that could leave work requests unaccounted for during recovery of the UMR Queue Pair (QP), tracked as CVE‑2025‑21892; the patch adds a final, barrier work request to guarantee completion of outstanding WRs before the QP...
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    Linux Kernel mlx5e CVE-2024-38608 Fix Availability First Patch Guide

    The Linux kernel received a targeted fix for a stability bug in the Mellanox/MLX5 Ethernet driver (mlx5e) that could cause a NULL-pointer oops and memory leaks during device probe and resume sequences — tracked as CVE‑2024‑38608 — and operators should treat this as an availability-first...
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    CVE-2024-38595: Patch fixes mlx5 devlink lifecycle to avoid kernel WARNs

    The Linux kernel vulnerability tracked as CVE‑2024‑38595 patches a subtle lifecycle inconsistency in the net/mlx5 driver’s devlink handling — a small code-path mismatch that can trigger kernel call traces and availability problems when the peer devlink set operation is invoked for an SF...
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    Azure Linux Attestation and CVE-2025-21732: Understanding mlx5 RDMA Risk

    Microsoft’s brief advisory that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate — but it is a product‑scoped attestation, not a categorical statement that no other Microsoft product could include the same vulnerable RDMA/mlx5 code. Background /...
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    CVE-2025-40250: Linux mlx5 IRQ cleanup bug fix stops kernel crashes

    A subtle but consequential Linux kernel bug in the Mellanox/MLX5 driver has been assigned CVE‑2025‑40250: mlx5_irq_alloc could, on a failed request_irq caused by exhausted IRQ vectors, free the entire IRQ mapping (rmap) rather than only the mapping that failed, potentially triggering general...
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    • cve 2025 40250 irq exhaustion linux kernel mlx5
    • Replies: 0
    • Forum: Security Alerts
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