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CVE-2023-54251 is a divide-by-zero vulnerability in the Linux kernel Time-Aware Priority (TAPRIO) traffic scheduler. TAPRIO stored the configured schedule cycle time as a signed 64-bit value but supplied it to a division helper accepting a signed 32-bit divisor. A cycle-time value of 0x100000000 passes the nonzero validation as a 64-bit value but truncates to zero when converted to the 32-bit divisor. Packet scheduling can subsequently invoke the elapsed-cycle calculation and trigger a kernel divide error. The fix rejects cycle-time values above INT_MAX, adds cycle-time overflow validation during schedule parsing, and prevents related overflow in transmit-time setup.
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Cross-references every affected SKU, including bundled OEM variants.
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