Bug 2536581 (CVE-2026-93110) - CVE-2026-93110 kernel: RDMA/core: Wait for RCU callbacks before unloading ib_core
Summary: CVE-2026-93110 kernel: RDMA/core: Wait for RCU callbacks before unloading ib_...
Keywords:
Status: NEW
Alias: CVE-2026-93110
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 18:31 UTC by OSIDB Bzimport
Modified: 2026-10-20 11:37 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 18:31:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

RDMA/core: Wait for RCU callbacks before unloading ib_core

put_gid_ndev() is queued with call_rcu() and implemented in ib_core.
Stopping the workqueues does not drain callbacks already queued, so RCU
could invoke it after the module code has been unloaded.

synchronize_rcu() does not wait for callbacks. Wait for them after all
producers have stopped.
Comment 1 gkamathe 2026-09-19 15:56:52 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93110.mbox
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