CVE-2026-52995

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/rds: zero per-item info buffer before handing it to visitors

rds_for_each_conn_info() and rds_walk_conn_path_info() both hand a

caller-allocated on-stack u64 buffer to a per-connection visitor and

then copy the full item_len bytes back to user space via

rds_info_copy() regardless of how much of the buffer the visitor

actually wrote.

rds_ib_conn_info_visitor() and rds6_ib_conn_info_visitor() only

write a subset of their output struct when the underlying

rds_connection is not in state RDS_CONN_UP (src/dst addr, tos, sl

and the two GIDs via explicit memsets). Several u32 fields

(max_send_wr, max_recv_wr, max_send_sge, rdma_mr_max, rdma_mr_size,

cache_allocs) and the 2-byte alignment hole between sl and

cache_allocs remain as whatever stack contents preceded the visitor

call and are then memcpy_to_user()'d out to user space.

struct rds_info_rdma_connection and struct rds6_info_rdma_connection

are the only rds_info_

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References