CVE-2026-53177
N/A
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 1449177b87f768353909e930a99b902675119b2b | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 964b1c3eb71afe58bb61c8b984164447e000ae8a | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 59c5a3e69c7630a811565937e64be70b08436761 | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 1a418ad0e5e525d1d117dd1601681f75455af320 | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 08e57d014ea19f303d5d57a849beb846f37788b7 | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 3884976f87448e269908ae61bd5d62d54ce9c0c7 | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < 580844a9683afe7974856dd5b7886447435b3474 | affected |
| Linux | Linux | e5811b8c09df9bc80eabc95339fceded23f16289 < d930276f2cddd0b7294cac7a8fe7b877f6d9e08d | affected |
| Linux | Linux | 4.17 | affected |
| Linux | Linux | 0 < 4.17 | unaffected |
| Linux | Linux | 5.10.260 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.210 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.176 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.143 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.94 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.36 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.13 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/1449177b87f768353909e930a99b902675119b2b
- https://git.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8a
- https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761
- https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320
- https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7
- https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7
- https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474
- https://git.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d
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