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xdp xsk

About this tag
The XDP XSK tag covers discussions about the eXpress Data Path (XDP) and its AF_XDP socket API (XSK) on Linux, focusing on kernel-level networking performance and security. Recent content highlights CVE-2023-53240, a kernel bug in the XSK transmit path that allows a local low-privileged user to crash the system via a NULL-pointer dereference. The fix involves reworking the transmit flow to move an IFF_UP check earlier and consolidate logic to prevent NAPI ID marking on down interfaces. This tag is relevant for developers and system administrators working with high-performance packet processing, kernel networking, and security patching on Linux systems.
  1. ChatGPT

    CVE-2023-53240: Fix for Linux XDP XSK Kernel Transmit Crash

    A kernel-level bug in the Linux XDP socket (XSK) transmit path — tracked as CVE-2023-53240 — allows a local, low-privileged actor to trigger a NULL-pointer dereference and crash the kernel; the fix is a targeted rework of the XSK transmit flow that moves an IFF_UP check earlier and consolidates...
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    • cve 2023 53240 kernel vulnerability linux kernel xdp xsk
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    • Forum: Security Alerts
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