CVE-2026-53177

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 1449177b87f768353909e930a99b902675119b2baffected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 964b1c3eb71afe58bb61c8b984164447e000ae8aaffected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 59c5a3e69c7630a811565937e64be70b08436761affected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 1a418ad0e5e525d1d117dd1601681f75455af320affected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 08e57d014ea19f303d5d57a849beb846f37788b7affected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 3884976f87448e269908ae61bd5d62d54ce9c0c7affected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < 580844a9683afe7974856dd5b7886447435b3474affected
LinuxLinuxe5811b8c09df9bc80eabc95339fceded23f16289 < d930276f2cddd0b7294cac7a8fe7b877f6d9e08daffected
LinuxLinux4.17affected
LinuxLinux0 < 4.17unaffected
LinuxLinux5.10.260 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References