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CVE-2025-21788

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases If the XDP program doesn't result in XDP_PASS then we leak the m…

Published Feb 27, 2025CWE-401EPSS 0.50%

Overview

CVE-2025-21788 is a high-severity vulnerability. It was published on February 27, 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:

net: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases

If the XDP program doesn't result in XDP_PASS then we leak the

memory allocated by am65_cpsw_build_skb().

It is pointless to allocate SKB memory before running the XDP

program as we would be wasting CPU cycles for cases other than XDP_PASS.

Move the SKB allocation after evaluating the XDP program result.

This fixes the memleak. A performance boost is seen for XDP_DROP test.

XDP_DROP test:

Before: 460256 rx/s 0 err/s

After: 784130 rx/s 0 err/s

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/1bba1d042107167164a0ae3a843fdf650ab005d7Refgit.kernel.org/stable/c/5db843258de1e4e6b1ef1cbd1797923c9e3de548Refgit.kernel.org/stable/c/dc11f049612b9d926aca2e55f8dc9d82850d0da3

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21788?

CVE-2025-21788 is a high-severity vulnerability. It was published on February 27, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-21788?

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-2025-21788?

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-2025-21788?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21788 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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