CVE-2026-23437
Published: Apr 3, 2026
Modified: May 11, 2026
CVSS v3.1
7.8
Description
In the Linux kernel, the following vulnerability has been resolved: net: shaper: protect late read accesses to the hierarchy We look up a netdev during prep of Netlink ops (pre- callbacks) and take a ref to it. Then later in the body of the callback we take its lock or RCU which are the actual protections. This is not proper, a conversion from a ref to a locked netdev must include a liveness check (a check if the netdev hasn't been unregistered already). Fix the read cases (those under RCU). Writes needs a separate change to protect from creating the hierarchy after flush has already run.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb - < 581eee0890a8bde44f1fb78ad3e70502a897d583affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb - < 348758ba74e6a348299965b16a97cfb817545cc0affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb - < 0f9ea7141f365b4f27226898e62220fb98ef8dc6 |
Linux | Linux | affected 6.13unaffected 0 - < 6.13unaffected 6.18.20 - <= 6.18.*unaffected 6.19.10 - <= 6.19.*unaffected 7.0 - <= * |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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