CVE-2026-53177

Description

In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Fix NULL pointer dereference PCIe errors detected by a Root Port or Downstream Port cause error recovery services to run on all subordinate devices regardless of administrative state. The .error_detected() callback, bnxt_io_error_detected(), disables and synchronizes IRQs via bnxt_disable_int_sync(), which calls bnxt_cp_num_to_irq_num() to map completion rings to IRQs using bp->bnapi. Since bp->bnapi is allocated on NIC open and freed on NIC close, PCIe error recovery on a closed NIC can dereference a NULL pointer. Check if bp->bnapi is NULL before disabling and synchronizing IRQs.

References

• https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7
• https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320
• https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7
• https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474
• https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761