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CVE-2025-38190

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: atm: Revert atm_account_tx() if copy_from_iter_full() fails.

Published Jul 4, 2025EPSS 0.20%

Overview

CVE-2025-38190 is a medium-severity vulnerability. It was published on July 4, 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:

atm: Revert atm_account_tx() if copy_from_iter_full() fails.

In vcc_sendmsg(), we account skb->truesize to sk->sk_wmem_alloc by

atm_account_tx().

It is expected to be reverted by atm_pop_raw() later called by

vcc->dev->ops->send(vcc, skb).

However, vcc_sendmsg() misses the same revert when copy_from_iter_full()

fails, and then we will leak a socket.

Let's factorise the revert part as atm_return_tx() and call it in

the failure path.

Note that the corresponding sk_wmem_alloc operation can be found in

alloc_tx() as of the blamed commit.

$ git blame -L:alloc_tx net/atm/common.c c55fa3cccbc2c~

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/2252c539c43f9a1431a7e8b34e3c18e9dd77a96dRefgit.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8Refgit.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5Refgit.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739Refgit.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777eRefgit.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859Refgit.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685Refgit.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1Reflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38190?

CVE-2025-38190 is a medium-severity vulnerability. It was published on July 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38190?

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-2025-38190?

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-2025-38190?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38190 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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