Bug 2467009 (CVE-2026-43103) - CVE-2026-43103 kernel: net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
Summary: CVE-2026-43103 kernel: net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
Keywords:
Status: NEW
Alias: CVE-2026-43103
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-06 10:03 UTC by OSIDB Bzimport
Modified: 2026-05-06 14:11 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-05-06 10:03:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: lapbether: handle NETDEV_PRE_TYPE_CHANGE

lapbeth_data_transmit() expects the underlying device type
to be ARPHRD_ETHER.

Returning NOTIFY_BAD from lapbeth_device_event() makes sure
bonding driver can not break this expectation.
Comment 1 Alexander B 2026-05-06 14:08:37 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050622-CVE-2026-43103-85e9@gregkh/T
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