Medium 5.5Published Jun 26, 2026

CVE-2026-53323net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops

Updated under an hour ago (Oct 27, 2026, 5:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 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: Analyzed
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 before 74d64ae4254e99ef8c8215b057a76edac82c5f99; from 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 before abe91fd045874d21834482adcd7a9693e7377056; 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 builds before 0f99e0c3e19badaf3fdced0d3feba623e59eed41	CNA record
linux linux_kernel linux:linux_kernel	from 6.15 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/74d64ae4254e99ef8c8215b057a76edac82c5f99	patch
https://git.kernel.org/stable/c/abe91fd045874d21834482adcd7a9693e7377056	patch
https://git.kernel.org/stable/c/0f99e0c3e19badaf3fdced0d3feba623e59eed41	patch

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.