---
id: CVE-2022-49204
title: 'bpf, sockmap: Fix more uncharged while msg has more_data'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf, sockmap: Fix more uncharged while msg has more_data

  In tcp_bpf_send_verdict(), if msg has more data after
  tcp_bpf_sendmsg_redir():

  tcp_bpf_send_verdict()
   tosend…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    7b812a369e6416ab06d83cdd39d8e3f752781dd0
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    168ff181f5b6e7fce684c98a30d35da1dbf8f82a
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    87d532d41ef937e16f61b3d2094f3a2ac49be365
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    abb4caa477a5450817d2aa1198edce66450aecf8
  - >-
    Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c <
    84472b436e760ba439e1969a9e3c5ae7c86de39d
  - Linux 4.20
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:44:31.554624Z'
published: '2025-02-26'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T19:49:37.271Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-49204'
references:
  - url: 'https://git.kernel.org/stable/c/244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf'
  - url: 'https://git.kernel.org/stable/c/7b812a369e6416ab06d83cdd39d8e3f752781dd0'
  - url: 'https://git.kernel.org/stable/c/168ff181f5b6e7fce684c98a30d35da1dbf8f82a'
  - url: 'https://git.kernel.org/stable/c/87d532d41ef937e16f61b3d2094f3a2ac49be365'
  - url: 'https://git.kernel.org/stable/c/abb4caa477a5450817d2aa1198edce66450aecf8'
  - url: 'https://git.kernel.org/stable/c/84472b436e760ba439e1969a9e3c5ae7c86de39d'
tags:
  - cve.org
epss: 0.00269
epssPercentile: 0.19251
ingestedAt: '2026-11-05T22:38:31.565Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

bpf, sockmap: Fix more uncharged while msg has more_data

In tcp_bpf_send_verdict(), if msg has more data after
tcp_bpf_sendmsg_redir():

tcp_bpf_send_verdict()
 tosend = msg->sg.size  //msg->sg.size = 22220
 case __SK_REDIRECT:
  sk_msg_return()  //uncharged msg->sg.size(22220) sk->sk_forward_alloc
  tcp_bpf_sendmsg_redir() //after tcp_bpf_sendmsg_redir, msg->sg.size=11000
 goto more_data;
 tosend = msg->sg.size  //msg->sg.size = 11000
 case __SK_REDIRECT:
  sk_msg_return()  //uncharged msg->sg.size(11000) to sk->sk_forward_alloc

The msg->sg.size(11000) has been uncharged twice, to fix we can charge the
remaining msg->sg.size before goto more data.

This issue can cause the following info:
WARNING: CPU: 0 PID: 9860 at net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0
Call Trace:
 <TASK>
 inet_csk_destroy_sock+0x55/0x110
 __tcp_close+0x279/0x470
 tcp_close+0x1f/0x60
 inet_release+0x3f/0x80
 __sock_release+0x3d/0xb0
 sock_close+0x11/0x20
 __fput+0x92/0x250
 task_work_run+0x6a/0xa0
 do_exit+0x33b/0xb60
 do_group_exit+0x2f/0xa0
 get_signal+0xb6/0x950
 arch_do_signal_or_restart+0xac/0x2a0
 ? vfs_write+0x237/0x290
 exit_to_user_mode_prepare+0xa9/0x200
 syscall_exit_to_user_mode+0x12/0x30
 do_syscall_64+0x46/0x80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
 </TASK>

WARNING: CPU: 0 PID: 2136 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260
Call Trace:
 <TASK>
 __sk_destruct+0x24/0x1f0
 sk_psock_destroy+0x19b/0x1c0
 process_one_work+0x1b3/0x3c0
 worker_thread+0x30/0x350
 ? process_one_work+0x3c0/0x3c0
 kthread+0xe6/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x22/0x30
 </TASK>

## Affected

- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < 244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf`
- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < 7b812a369e6416ab06d83cdd39d8e3f752781dd0`
- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < 168ff181f5b6e7fce684c98a30d35da1dbf8f82a`
- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < 87d532d41ef937e16f61b3d2094f3a2ac49be365`
- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < abb4caa477a5450817d2aa1198edce66450aecf8`
- `Linux >= 604326b41a6fb9b4a78b6179335decee0365cd8c < 84472b436e760ba439e1969a9e3c5ae7c86de39d`
- `Linux 4.20`

## Remediation

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