---
id: CVE-2025-38190
title: 'atm: Revert atm_account_tx() if copy_from_iter_full() fails.'
summary: |-
  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…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    5e0d00992118e234ebf29d5145c1cc920342777e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c12430edd92fd49a4800b0f3fb395b50cb16bcc1
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    287b4f085d2ca3375cf1ee672af27410c64777e8
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    3902205eadf35db59dbc2186c2a98b9e6182efa5
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    3d828519bd69bfcaabdd942a872679617ef06739
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    7851263998d4269125fd6cb3fdbfc7c6db853859
  - Linux 2.6.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:50:55.432970Z'
published: '2025-07-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:52:18.709Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38190'
references:
  - url: 'https://git.kernel.org/stable/c/5e0d00992118e234ebf29d5145c1cc920342777e'
  - url: 'https://git.kernel.org/stable/c/c12430edd92fd49a4800b0f3fb395b50cb16bcc1'
  - url: 'https://git.kernel.org/stable/c/287b4f085d2ca3375cf1ee672af27410c64777e8'
  - url: 'https://git.kernel.org/stable/c/2252c539c43f9a1431a7e8b34e3c18e9dd77a96d'
  - url: 'https://git.kernel.org/stable/c/3902205eadf35db59dbc2186c2a98b9e6182efa5'
  - url: 'https://git.kernel.org/stable/c/3d828519bd69bfcaabdd942a872679617ef06739'
  - url: 'https://git.kernel.org/stable/c/7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685'
  - url: 'https://git.kernel.org/stable/c/7851263998d4269125fd6cb3fdbfc7c6db853859'
tags:
  - cve.org
epss: 0.00205
epssPercentile: 0.1058
ingestedAt: '2026-11-05T22:38:31.929Z'
---

## Overview

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~

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5e0d00992118e234ebf29d5145c1cc920342777e`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c12430edd92fd49a4800b0f3fb395b50cb16bcc1`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 287b4f085d2ca3375cf1ee672af27410c64777e8`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2252c539c43f9a1431a7e8b34e3c18e9dd77a96d`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3902205eadf35db59dbc2186c2a98b9e6182efa5`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3d828519bd69bfcaabdd942a872679617ef06739`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7851263998d4269125fd6cb3fdbfc7c6db853859`
- `Linux 2.6.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.