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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7 cve-icon
https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320 cve-icon
https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7 cve-icon
https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474 cve-icon
https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761 cve-icon
https://git.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8a cve-icon
https://git.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d cve-icon
https://lore.kernel.org/linux-cve-announce/2026062554-CVE-2026-53177-f6ba@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-53177 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-53177 cve-icon
History

Tue, 30 Jun 2026 04:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 30 Jun 2026 02:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 30 Jun 2026 00:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Thu, 25 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
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.
Title bnxt_en: Fix NULL pointer dereference
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-25T08:38:53.347Z

Updated: 2026-06-25T08:38:53.347Z

Reserved: 2026-06-09T07:44:35.389Z

Link: CVE-2026-53177

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-06-25T00:00:00Z

Links: CVE-2026-53177 - Bugzilla