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CVE-2024-38540 is an undefined-behavior flaw in the Linux kernel Broadcom NetXtreme-E RDMA driver, bnxt_re. In bnxt_qplib_alloc_init_hwq(), the driver can invoke roundup_pow_of_two() with an auxiliary queue stride of zero when the auxiliary queue depth is nonzero. The helper is undefined for a zero argument, resulting in a shift exponent equal to the width of an unsigned long (64 on affected 64-bit systems). The flaw was observed during queue-pair creation while the driver initializes RDMA management resources.
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Linux kernel Broadcom NetXtreme RDMA driver undefined shift behavior.
Undefined shift behavior in the Linux kernel Broadcom bnxt_re RDMA driver.
Linux kernel bnxt_re driver flaw involving undefined shift behavior in bnxt_qplib_alloc_init_hwq.
Linux kernel bnxt_re driver undefined-shift behavior flaw in bnxt_qplib_alloc_init_hwq.
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