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CVE-2024-40992

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix responder length checking for UD request packets According to the IBA specification: If a UD request packet is de…

Published Jul 12, 2024EPSS 0.61%

Overview

CVE-2024-40992 is a high-severity vulnerability. It was published on July 12, 2024 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:

RDMA/rxe: Fix responder length checking for UD request packets

According to the IBA specification:

If a UD request packet is detected with an invalid length, the request

shall be an invalid request and it shall be silently dropped by

the responder. The responder then waits for a new request packet.

commit 689c5421bfe0 ("RDMA/rxe: Fix incorrect responder length checking")

defers responder length check for UD QPs in function `copy_data`.

But it introduces a regression issue for UD QPs.

When the packet size is too large to fit in the receive buffer.

`copy_data` will return error code -EINVAL. Then `send_data_in`

will return RESPST_ERR_MALFORMED_WQE. UD QP will transfer into

ERROR state.

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/163868ec1f6c610d16da9e458fe1dd7d5de97341Refgit.kernel.org/stable/c/943c94f41dfe36536dc9aaa12c9efdf548ceb996Refgit.kernel.org/stable/c/f67ac0061c7614c1548963d3ef1ee1606efd8636Refgit.kernel.org/stable/c/163868ec1f6c610d16da9e458fe1dd7d5de97341Refgit.kernel.org/stable/c/943c94f41dfe36536dc9aaa12c9efdf548ceb996Refgit.kernel.org/stable/c/f67ac0061c7614c1548963d3ef1ee1606efd8636

How CyberStrike helps

Frequently asked questions

What is CVE-2024-40992?

CVE-2024-40992 is a high-severity vulnerability. It was published on July 12, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-40992?

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-2024-40992?

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-2024-40992?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-40992 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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