Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb before 581eee0890a8bde44f1fb78ad3e70502a897d583; affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb before 348758ba74e6a348299965b16a97cfb817545cc0; affected 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb before 0f9ea7141f365b4f27226898e62220fb98ef8dc6 |
| Linux / Linux | affected 6.13; unaffected 0 before 6.13; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583
- https://git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0
- https://git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6
ADP enrichment
No English description supplied.
No references supplied.