What’s Vulnerable › Vulnerabilities

CVE-2026-74389: RDMA/hns: Fix log flood after cmd_mbox failure

• 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: 2026-08-15 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix log flood after cmd_mbox failure hns_roce_cmd_mbox() is the command interface between driver and hardware. When hardware is abnormal, the unlimited error printings after hns_roce_cmd_mbox() failure will cause log flood and even system crash. Replace ibdev_err() and ibdev_warn() with their ratelimited versions in the error handling path after hns_roce_cmd_mbox() (and its wrappers hns_roce_create_hw_ctx/hns_roce_destroy_hw_ctx) fails.

Affected products

• Linux: 4.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/66f44ec974ab372e4e1ee9eac4245237c94e8f68
• https://git.kernel.org/stable/c/7d9fbee252f84de3e6947a40eec01481c9d8afbb
• https://git.kernel.org/stable/c/a194e535019e0b32831f16b0eafd83c54d57ccbb
• https://git.kernel.org/stable/c/a6c5f5d98719e69228512390d5db3bf4b6468064
• https://git.kernel.org/stable/c/bbd97d71e53e551890e4115ad9de46b5f2ac0858
• https://git.kernel.org/stable/c/f3c9e84268e9fa613d40d6c138fb6969c35879b5

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