CVE-2022-49429: linux kernel Null Dereference — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.14.283
linux	linux_kernel	4.15 — 4.19.247
linux	linux_kernel	4.20 — 5.4.198
linux	linux_kernel	5.5 — 5.10.121
linux	linux_kernel	5.11 — 5.15.46
linux	linux_kernel	5.16 — 5.17.14
linux	linux_kernel	5.18 — 5.18.3

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2022-49429? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49429? +

CVE-2022-49429 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-49429? +

CVE-2022-49429 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49429? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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