A vulnerability in the Linux kernel's cpsw network driver could cause an attempt to unregister a network device that was never registered, leading… (CVE-2026-43219)
A vulnerability in the Linux kernel's cpsw network driver could cause an attempt to unregister a network device that was never registered, leading to a potential denial of service. This occurs if an error happens during the registration of the first MAC device, leaving the second MAC device's state inconsistent. The issue is addressed by adding a check for the device's registration state before unregistering it.
AI Analysis
Technical Summary
The Linux kernel vulnerability (CVE-2026-43219) involves the cpsw network driver where an error during register_netdev() for the first MAC in cpsw_register_ports() leaves cpsw->slaves[1].ndev unchanged despite cpsw->slaves[0].ndev being set to NULL. This inconsistency can cause cpsw_unregister_ports() to attempt to unregister a network device that was never registered. The fix adds a check for ndev->reg_state before calling unregister_netdev(), preventing improper unregister attempts and removing the need to set cpsw->slaves[i].ndev to NULL.
Potential Impact
The vulnerability can cause a denial of service (DoS) by triggering an improper unregister operation on a network device that was never registered. There is no impact on confidentiality or integrity. The attack vector requires local access with low privileges and no user interaction is needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The fix involves adding a check for the network device's registration state before unregistering it. Until an official fix is confirmed, users should monitor vendor advisories for updates.
A vulnerability in the Linux kernel's cpsw network driver could cause an attempt to unregister a network device that was never registered, leading… (CVE-2026-43219)
Description
A vulnerability in the Linux kernel's cpsw network driver could cause an attempt to unregister a network device that was never registered, leading to a potential denial of service. This occurs if an error happens during the registration of the first MAC device, leaving the second MAC device's state inconsistent. The issue is addressed by adding a check for the device's registration state before unregistering it.
CVSS v3.1
Score 5.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability (CVE-2026-43219) involves the cpsw network driver where an error during register_netdev() for the first MAC in cpsw_register_ports() leaves cpsw->slaves[1].ndev unchanged despite cpsw->slaves[0].ndev being set to NULL. This inconsistency can cause cpsw_unregister_ports() to attempt to unregister a network device that was never registered. The fix adds a check for ndev->reg_state before calling unregister_netdev(), preventing improper unregister attempts and removing the need to set cpsw->slaves[i].ndev to NULL.
Potential Impact
The vulnerability can cause a denial of service (DoS) by triggering an improper unregister operation on a network device that was never registered. There is no impact on confidentiality or integrity. The attack vector requires local access with low privileges and no user interaction is needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. The fix involves adding a check for the network device's registration state before unregistering it. Until an official fix is confirmed, users should monitor vendor advisories for updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-86c9-4w26-qf4c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43219"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a498a7b27e9c7971936f6bd
Added to database: 07/04/2026, 22:34:35 UTC
Last enriched: 07/04/2026, 23:06:59 UTC
Last updated: 07/31/2026, 19:24:49 UTC
Views: 10
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