What’s Vulnerable › Vulnerabilities

CVE-2026-93110: RDMA/core: Wait for RCU callbacks before unloading ib_core

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

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.

Affected products

• Linux kernel: 5.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0d5817fa4819abdc445fa77b5be4f0d49334a864
• https://git.kernel.org/stable/c/1646e123e56c3ad679fbfb571e8eef6386efb729
• https://git.kernel.org/stable/c/48b72fa0d209a92fb51b834a6080171cfa207b2c
• https://git.kernel.org/stable/c/7853af5f15738dc00aebaa1fc9f1f0df40f6f603
• https://git.kernel.org/stable/c/7d75592114d1664623c8cf191a12b38052c04483
• https://git.kernel.org/stable/c/82dfd1df456227279b1c8c648983a530f2612098
• https://git.kernel.org/stable/c/8e4f1677c09d75d738099f42afcf65d8587b664a
• https://git.kernel.org/stable/c/9d998297fdaf47492f6679287f6552879d1a7e3a

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