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CVE-2026-98257

rds: ib: use rds_conn_drop() on protocol version mismatch

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: rds: ib: use rds_conn_drop() on protocol version mismatch rds_ib_cm_connect_complete() runs from the RDMA-CM event handler with conn->c_cm_lock held. When the peer negotiates a protocol version older than RDS_PROTOCOL_COMPAT_VERSION, the handler calls rds_conn_destroy(), which is only safe in the rmmod path: it synchronously tears the connection down and flush_work()es the shutdown work cp_down_w. That shutdown work (rds_conn_shutdown()) needs cp_cm_lock, which is the very lock the event handler still holds, so the flush never completes: the two workers wait on each other and the RDS connection workqueues stall for good. All other RDMA-CM failure paths (REJECTED, CONNECT_ERROR, DISCONNECTED) use rds_conn_drop(), which marks the connection RDS_CONN_ERROR and schedules the shutdown work asynchronously. Use it here as well.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in 424019be3f637da76b74f44a40034669acbb166f; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in 14fb90067d13f4494cff0f03243fae3cf2911cbc; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in 344c72a0bc2703a6de4918ed935850e07dae3af2; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in b5c9f2951d330d4a198a64d6e60f79b4bd6ef078; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in d392b16acd0908f077289aad8bba066ff16de336; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in 65ca0a5037152a5a80b8fe6aac80eb80458be573; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in 7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8; From f147dd9ecabf23fd63d2562ffe64252a0453ecde · fixed in f97d8c7bab7843631206a114986c9059da03efeb

  • Linux Linux

    2.6.37

  • KernelLinux

    From 2.6.37 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.54; From 6.19.0 · fixed in 7.2.8

References 8

git.kernel.org