GHSA-vg65-jq85-8q85MediumCVSS 5.5
In the Linux kernel, the following vulnerability has been resolved: net: dsa: remove redundant...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2026-53323
- https://git.kernel.org/stable/c/0f99e0c3e19badaf3fdced0d3feba623e59eed41
- https://git.kernel.org/stable/c/74d64ae4254e99ef8c8215b057a76edac82c5f99
- https://git.kernel.org/stable/c/abe91fd045874d21834482adcd7a9693e7377056
- https://github.com/advisories/GHSA-vg65-jq85-8q85