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CVE-2022-49930

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix NULL pointer problem in free_mr_init() Lock grab occurs in a concurrent scenario, resulting in stepping on a NULL…

Published May 1, 2025CWE-476EPSS 0.16%

Overview

CVE-2022-49930 is a medium-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/hns: Fix NULL pointer problem in free_mr_init()

Lock grab occurs in a concurrent scenario, resulting in stepping on a NULL

pointer. It should be init mutex_init() first before use the lock.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000

Call trace:

__mutex_lock.constprop.0+0xd0/0x5c0

__mutex_lock_slowpath+0x1c/0x2c

mutex_lock+0x44/0x50

free_mr_send_cmd_to_hw+0x7c/0x1c0 [hns_roce_hw_v2]

hns_roce_v2_dereg_mr+0x30/0x40 [hns_roce_hw_v2]

hns_roce_dereg_mr+0x4c/0x130 [hns_roce_hw_v2]

ib_dereg_mr_user+0x54/0x124

uverbs_free_mr+0x24/0x30

destroy_hw_idr_uobject+0x38/0x74

uverbs_destroy_uobject+0x48/0x1c4

uobj_destroy+0x74/0xcc

ib_uverbs_cmd_verbs+0x368/0xbb0

ib_uverbs_ioctl+0xec/0x1a4

__arm64_sys_ioctl+0xb4/0x100

invoke_syscall+0x50/0x120

el0_svc_common.constprop.0+0x58/0x190

do_el0_svc+0x30/0x90

el0_svc+0x2c/0xb4

el0t_64

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0e23e85d86b78e734dd6654f1b69fbaeb5534c81Refgit.kernel.org/stable/c/12bcaf87d8b66d8cd812479c8a6349dcb245375c

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49930?

CVE-2022-49930 is a medium-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49930?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49930?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49930?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49930 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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