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CVE-2022-49321

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: treat all calls not a bcall when bc_serv is NULL When a rdma server returns a fault format reply, nfs v3 client may t…

Published Feb 26, 2025CWE-476EPSS 0.77%

Overview

CVE-2022-49321 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

xprtrdma: treat all calls not a bcall when bc_serv is NULL

When a rdma server returns a fault format reply, nfs v3 client may

treats it as a bcall when bc service is not exist.

The debug message at rpcrdma_bc_receive_call are,

[56579.837169] RPC: rpcrdma_bc_receive_call: callback XID

00000001, length=20

[56579.837174] RPC: rpcrdma_bc_receive_call: 00 00 00 01 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 04

After that, rpcrdma_bc_receive_call will meets NULL pointer as,

[ 226.057890] BUG: unable to handle kernel NULL pointer dereference at

00000000000000c8

...

[ 226.058704] RIP: 0010:_raw_spin_lock+0xc/0x20

...

[ 226.059732] Call Trace:

[ 226.059878] rpcrdma_bc_receive_call+0x138/0x327 [rpcrdma]

[ 226.060011] __ib_process_cq+0x89/0x170 [ib_core]

[ 226.060092] ib_cq_poll_work+0x26/0x80 [ib_core]

[ 226.060257] process_one_work+0x1a7/0x360

[ 226.060367] ? create_worker+0x1a0/0x1a0

[ 226.0604

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/11270e7ca268e8d61b5d9e5c3a54bd1550642c9cRefgit.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4Refgit.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18cRefgit.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402Refgit.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126aRefgit.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1Refgit.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815Refgit.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49321?

CVE-2022-49321 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-49321?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-49321?

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-2022-49321?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49321 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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