bnxt_en: Fix NULL pointer dereference

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.

Timeline

1. Jun 25, 2026, 8:38 AM UTCCVE published
2. Oct 15, 2026, 1:22 AM UTCRecord last updated

Affected versions

• Linux Linux

  From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 1449177b87f768353909e930a99b902675119b2b; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 964b1c3eb71afe58bb61c8b984164447e000ae8a; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 59c5a3e69c7630a811565937e64be70b08436761; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 1a418ad0e5e525d1d117dd1601681f75455af320; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 08e57d014ea19f303d5d57a849beb846f37788b7; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 3884976f87448e269908ae61bd5d62d54ce9c0c7; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in 580844a9683afe7974856dd5b7886447435b3474; From e5811b8c09df9bc80eabc95339fceded23f16289 · fixed in d930276f2cddd0b7294cac7a8fe7b877f6d9e08d

• Linux Linux

  4.17

• KernelLinux

  From 4.17.0 · fixed in 5.10.260; From 5.11.0 · fixed in 5.15.210; From 5.16.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.143; From 6.7.0 · fixed in 6.12.94; From 6.13.0 · fixed in 6.18.36; From 6.19.0 · fixed in 7.0.13

References 8