Riskcovery

CVE-2026-89534

svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails

State
Published
Severity
8.8 High
Published
Sep 11, 2026
Updated
Oct 30, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

Description

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

svcrdma: Clear sc_cm_id when ADDR_CHANGE replacement fails

When svc_rdma_listen_handler() handles RDMA_CM_EVENT_ADDR_CHANGE, it creates a replacement listener cm_id and returns 1, telling the CM core to destroy the old one. If the replacement allocation fails, sc_cm_id still points at the old cm_id that the CM core is about to destroy. Any subsequent dereference of sc_cm_id -- such as svc_rdma_detach()'s rdma_disconnect() call -- is a use-after-free.

NULL sc_cm_id on the failure path and guard svc_rdma_detach()'s rdma_disconnect() call against NULL so that the listener can be torn down safely when the server shuts down.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • d1b586e75ec619dde1af47e21a41a6b1b51874c2 to before 2a68aeb2de8ad0fef9c50e73a50622a35c6af1a8Affected
  • d1b586e75ec619dde1af47e21a41a6b1b51874c2 to before 65f0f82f20334e76acaf29087a59af7b3b9699edAffected
  • d1b586e75ec619dde1af47e21a41a6b1b51874c2 to before 673e358ab7c11f8cec223c6a36a793056a67facdAffected
  • d1b586e75ec619dde1af47e21a41a6b1b51874c2 to before 01500306e1d50de7ca7a2cdcdfa28ac0523eb747Affected
  • 2f84d6e8b0a7093758d8da19cec111140e7b6d41Affected
  • 5cd069ad1cf7fb46af31f0dbe2850868335f5272Affected
  • 6.1.191 to before 6.2Affected
  • 6.6.160 to before 6.7Affected
LinuxLinux
  • 6.11Affected
  • before 6.11Not affected
  • 6.12.114 through 6.12.*Not affected
  • 6.18.57 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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