What’s Vulnerable › Vulnerabilities

CVE-2022-49429: RDMA/hfi1: Prevent panic when SDMA is disabled

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Prevent panic when SDMA is disabled If the hfi1 module is loaded with HFI1_CAP_SDMA off, a call to hfi1_write_iter() will dereference a NULL pointer and panic. A typical stack frame is: sdma_select_user_engine [hfi1] hfi1_user_sdma_process_request [hfi1] hfi1_write_iter [hfi1] do_iter_readv_writev do_iter_write vfs_writev do_writev do_syscall_64 The fix is to test for SDMA in hfi1_write_iter() and fail the I/O with EINVAL.

Affected products

• Linux kernel: before 4.14.283; from 4.15 before 4.19.247; from 4.20 before 5.4.198; from 5.5 before 5.10.121; from 5.11 before 5.15.46; from 5.16 before 5.17.14 — fixed in 4.14.283, 4.19.247, 5.10.121, 5.15.46, 5.17.14, 5.18.3

How to fix

Upgrade to a fixed version: Linux kernel 4.14.283, 4.19.247, 5.10.121, 5.15.46. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0e4dda8b3f4c07ee9ea670a10ea3171a5e63a86f
• https://git.kernel.org/stable/c/22e7e400fd1a890db2ea13686324aff50e972f4f
• https://git.kernel.org/stable/c/29952ab85d6c3fe0b7909d9a737f10c58bf6824d
• https://git.kernel.org/stable/c/32e6aea33944f364d51cd263e4cd236393a188b6
• https://git.kernel.org/stable/c/33794e8e9bcb4affc0ebff9cdec85acc8b8a1762
• https://git.kernel.org/stable/c/629e052d0c98e46dde9f0824f0aa437f678d9b8f
• https://git.kernel.org/stable/c/cc80d3c37cec9d6ddb140483647901bc7cc6c31d
• https://git.kernel.org/stable/c/e60ad83f645ee6fadd5a8057ba267aeec54f08fe

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