Medium 5.5Published Jun 25, 2026

CVE-2026-53177bnxt_en: Fix NULL pointer dereference

Updated under an hour ago (Oct 27, 2026, 9:23 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e5811b8c09df9bc80eabc95339fceded23f16289 before 1449177b87f768353909e930a99b902675119b2b; from e5811b8c09df9bc80eabc95339fceded23f16289 before 964b1c3eb71afe58bb61c8b984164447e000ae8a; from e5811b8c09df9bc80eabc95339fceded23f16289 before 59c5a3e69c7630a811565937e64be70b08436761; from e5811b8c09df9bc80eabc95339fceded23f16289 before 1a418ad0e5e525d1d117dd1601681f75455af320; from e5811b8c09df9bc80eabc95339fceded23f16289 before 08e57d014ea19f303d5d57a849beb846f37788b7; from e5811b8c09df9bc80eabc95339fceded23f16289 before 3884976f87448e269908ae61bd5d62d54ce9c0c7; from e5811b8c09df9bc80eabc95339fceded23f16289 before 580844a9683afe7974856dd5b7886447435b3474; from e5811b8c09df9bc80eabc95339fceded23f16289 before d930276f2cddd0b7294cac7a8fe7b877f6d9e08d	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.17 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; 7.1; and 5 more ranges	NVD

References

References

https://git.kernel.org/stable/c/1449177b87f768353909e930a99b902675119b2b	patch
https://git.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8a	patch
https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761	patch
https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320	patch
https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7	patch
https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7	patch
https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474	patch
https://git.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.