cve 2026 31422

  1. CVE-2026-31422: Linux cls_flow NULL Dereference Fix for Shared Blocks

    CVE-2026-31422 is a classic example of how a small assumption in the Linux networking stack can turn into a kernel crash. The flaw lives in net/sched/cls_flow, where flow_change() can dereference b->q to derive a default baseclass even when the filter is attached to a shared block that...
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    • cve 2026 31422 linux kernel networking null pointer dereference traffic control
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