CVE-2026-53323
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 < 74d64ae4254e99ef8c8215b057a76edac82c5f99 | affected |
| Linux | Linux | 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 < abe91fd045874d21834482adcd7a9693e7377056 | affected |
| Linux | Linux | 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 < 0f99e0c3e19badaf3fdced0d3feba623e59eed41 | affected |
| Linux | Linux | 6.15 | affected |
| Linux | Linux | 0 < 6.15 | unaffected |
| Linux | Linux | 6.18.33 <= 6.18.* | unaffected |
| Linux | Linux | 7.0.10 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/74d64ae4254e99ef8c8215b057a76edac82c5f99
- https://git.kernel.org/stable/c/abe91fd045874d21834482adcd7a9693e7377056
- https://git.kernel.org/stable/c/0f99e0c3e19badaf3fdced0d3feba623e59eed41
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.