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CVE-2026-53177

5.5 · MEDIUM

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 r…

Published Jun 25, 2026CWE-476EPSS 0.13%

Overview

CVE-2026-53177 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7Refgit.kernel.org/stable/c/1449177b87f768353909e930a99b902675119b2bRefgit.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320Refgit.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7Refgit.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474Refgit.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761Refgit.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8aRefgit.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53177?

CVE-2026-53177 is a medium-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53177?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53177?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53177?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53177 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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