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CVE-2023-53034 is an invalid bit-shift vulnerability in the Linux kernel's Switchtec non-transparent bridge driver, ntb_hw_switchtec. The kernel API ntb_mw_clear_trans() passes zero address and size values to switchtec_ntb_mw_set_trans(), which can cause xlate_pos to become negative. Using that value with BIT produces an invalid shift operation. A UBSAN diagnostic identified a shift exponent of -1. The fix ensures that xlate_pos is nonnegative before it is used with BIT.
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A shift-out-of-bounds vulnerability in the Linux kernel's Switchtec non-transparent bridge driver. Clearing a memory-window translation can produce a negative shift exponent. The fix validates that xlate_pos is nonnegative before using BIT. The advisory assigns a CVSS v3 score of 7.1, with local access and low privileges required and potential high confidentiality and availability impacts.
Referenced by the TuxCare CentOS 8.5 security advisory; no vulnerability details are provided.
A Linux kernel vulnerability in ntb_hw_switchtec involving a shift-out-of-bounds condition in switchtec_ntb_mw_set_trans.
A Linux kernel vulnerability in ntb_hw_switchtec involving a shift-out-of-bounds condition in switchtec_ntb_mw_set_trans.
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