VulnerabilityPublished 25 Jun 2026Updated 6 Nov 2026

CVE-2026-53177: Linux kernel · bnxt_en: Fix NULL pointer dereference

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d930276f2cddd0b7294cac7a8fe7b877f6d9e08d : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in d930276f2cddd0b7294cac7a8fe7b877f6d9e08d, 3884976f87448e269908ae61bd5d62d54ce9c0c7, 1449177b87f768353909e930a99b902675119b2b +5

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < d930276f2cddd0b7294cac7a8fe7b877f6d9e08d	Fixed in d930276f2cddd0b7294cac7a8fe7b877f6d9e08d
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < 3884976f87448e269908ae61bd5d62d54ce9c0c7	Fixed in 3884976f87448e269908ae61bd5d62d54ce9c0c7
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < 1449177b87f768353909e930a99b902675119b2b	Fixed in 1449177b87f768353909e930a99b902675119b2b
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < 580844a9683afe7974856dd5b7886447435b3474	Fixed in 580844a9683afe7974856dd5b7886447435b3474
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < 964b1c3eb71afe58bb61c8b984164447e000ae8a	Fixed in 964b1c3eb71afe58bb61c8b984164447e000ae8a
LinuxLinux	Affected ≥ e5811b8c09df9bc80eabc95339fceded23f16289, < 59c5a3e69c7630a811565937e64be70b08436761	Fixed in 59c5a3e69c7630a811565937e64be70b08436761

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.

References

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