Linux-Kernel RDS RDMA CM: Protect Active ID on Route Failure
CVE-2026-99212 Published on October 28, 2026
net/rds: don't let the rdma_cm destroy an id RDS still owns on route failure
In the Linux kernel, the following vulnerability has been resolved:
net/rds: don't let the rdma_cm destroy an id RDS still owns on route failure
rds_rdma_cm_event_handler_cmn() hands the return value of
rdma_resolve_route() straight back to the rdma_cm on
RDMA_CM_EVENT_ADDR_RESOLVED. A synchronous failure there - -ENOMEM
from the route work allocation, an SA query that cannot be set up, a
RoCE route with no usable device - makes addr_handler() destroy the
id the event was delivered on. That id is ic->i_cm_id, and nothing
clears the pointer: the connection sits in RDS_CONN_CONNECTING with a
freed id until its shutdown calls rdma_disconnect() and
rdma_destroy_id() on it.
The ROUTE_RESOLVED case already avoids this: rds_ib_cm_initiate_connect()
forces a zero return while ic->i_cm_id == cm_id, as the comment there
explains. Do the same here - drop the connection and return 0 - so
the id stays RDS's to destroy from the shutdown, and the reconnect
gets a fresh one.
Products Associated with CVE-2026-99212
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Affected Versions
Linux:- Version 55b7ed0b582f9ff4bf3b9b44969cddda8c6763ea and below a7c7d0ff876377fea7ae876a28d6df8d9349df57 is affected.
- Version 55b7ed0b582f9ff4bf3b9b44969cddda8c6763ea and below 91ece3efa064f0b3b3c67b9b045d9eeb4a034e43 is affected.
- Version 55b7ed0b582f9ff4bf3b9b44969cddda8c6763ea and below 98d446b7c013254a8a7b49720557676a3a851fde is affected.
- Version 2.6.30 is affected.
- Before 2.6.30 is unaffected.
- Version 6.18.59, <= 6.18.* is unaffected.
- Version 7.2.13, <= 7.2.* is unaffected.
- Version 7.3, <= * is unaffected.