In the Linux kernel, the following vulnerability has been resolved: net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops DSA… (CVE-2026-53323)
In the Linux kernel, the following vulnerability has been resolved: net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops DSA replaces the conduit (master) device's ethtool_ops with its own wrappers that aggregate stats from both the conduit and DSA switch ports. Taking the lock again inside the DSA wrappers causes a deadlock. Stumbled upon this when booting qemu with fbnic and CONFIG_NET_DSA_LOOP=y (which looks like some kind of testing device that auto-populates the ports of eth0). `ethtool -i` is enough to deadlock. This means we have basically zero coverage for DSA stuff with real ops locked devs. Remove the redundant netdev_lock_ops()/netdev_unlock_ops() calls from the DSA conduit ethtool wrappers.
AI Analysis
Technical Summary
The Linux kernel's DSA subsystem replaces the conduit device's ethtool operations with wrappers that aggregate statistics from both the conduit and DSA switch ports. These wrappers incorrectly invoke netdev_lock_ops() and netdev_unlock_ops() calls redundantly, causing a deadlock when the lock is already held. This was discovered during testing with qemu and the fbnic device with CONFIG_NET_DSA_LOOP enabled. The deadlock occurs when running 'ethtool -i', effectively blocking ethtool operations on affected devices. The fix involves removing the redundant locking calls from the DSA conduit ethtool wrappers.
Potential Impact
The vulnerability results in a deadlock condition when using ethtool commands on DSA conduit devices, causing denial of service by blocking network device management operations. There is no impact on confidentiality or integrity. The vulnerability requires local privileges and user interaction is not required. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid running ethtool commands on DSA conduit devices in affected configurations to prevent deadlocks.
In the Linux kernel, the following vulnerability has been resolved: net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops DSA… (CVE-2026-53323)
Description
In the Linux kernel, the following vulnerability has been resolved: net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops DSA replaces the conduit (master) device's ethtool_ops with its own wrappers that aggregate stats from both the conduit and DSA switch ports. Taking the lock again inside the DSA wrappers causes a deadlock. Stumbled upon this when booting qemu with fbnic and CONFIG_NET_DSA_LOOP=y (which looks like some kind of testing device that auto-populates the ports of eth0). `ethtool -i` is enough to deadlock. This means we have basically zero coverage for DSA stuff with real ops locked devs. Remove the redundant netdev_lock_ops()/netdev_unlock_ops() calls from the DSA conduit ethtool wrappers.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel's DSA subsystem replaces the conduit device's ethtool operations with wrappers that aggregate statistics from both the conduit and DSA switch ports. These wrappers incorrectly invoke netdev_lock_ops() and netdev_unlock_ops() calls redundantly, causing a deadlock when the lock is already held. This was discovered during testing with qemu and the fbnic device with CONFIG_NET_DSA_LOOP enabled. The deadlock occurs when running 'ethtool -i', effectively blocking ethtool operations on affected devices. The fix involves removing the redundant locking calls from the DSA conduit ethtool wrappers.
Potential Impact
The vulnerability results in a deadlock condition when using ethtool commands on DSA conduit devices, causing denial of service by blocking network device management operations. There is no impact on confidentiality or integrity. The vulnerability requires local privileges and user interaction is not required. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid running ethtool commands on DSA conduit devices in affected configurations to prevent deadlocks.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vg65-jq85-8q85
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53323"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a4c33fb27e9c797195f0e51
Added to database: 07/06/2026, 23:02:19 UTC
Last enriched: 07/06/2026, 23:08:38 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.