---
id: CVE-2026-98300
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  tcp: Don't call skb_clone_and_charge_r() for close()d listener in
  tcp_v6_do_rcv().


  tcp_v6_do_rcv() no longer calls skb_clone_and_charge_r() for

  TCP_LISTEN since commit…
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  tcp: Don't call skb_clone_and_charge_r() for close()d listener in
  tcp_v6_do_rcv().


  tcp_v6_do_rcv() no longer calls skb_clone_and_charge_r() for

  TCP_LISTEN since commit…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    a23a3bc5004df6434de05797e0b6b2ecf864b86a
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    7d94602e77a4525611afebb23149145ac242afd7
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    b727e3d58cb906f1506c1334dfba71fbb1338339
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    3e3394a13b603cc79b6a35480b8e20df6c716944
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    619bfbaacbff6a9822923f69f6af29d7f66a870c
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    56d38839ef0bff6526d9bd73b6811bd00316b21c
  - >-
    Linux >= e994b2f0fb9229aeff5eea9541320bd7b2ca8714 <
    8e759cd1f6444a946bd1fd2b2b29eea582eea1d5
  - Linux 4.4
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:20.867'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98300'
references:
  - url: 'https://git.kernel.org/stable/c/1cb7f292a337fdc72a8219bcd9d40a9cf5e86db5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3e3394a13b603cc79b6a35480b8e20df6c716944'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/56d38839ef0bff6526d9bd73b6811bd00316b21c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/619bfbaacbff6a9822923f69f6af29d7f66a870c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7d94602e77a4525611afebb23149145ac242afd7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8e759cd1f6444a946bd1fd2b2b29eea582eea1d5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a23a3bc5004df6434de05797e0b6b2ecf864b86a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b727e3d58cb906f1506c1334dfba71fbb1338339'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.414Z'
---

## Overview

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

tcp: Don't call skb_clone_and_charge_r() for close()d listener in tcp_v6_do_rcv().

tcp_v6_do_rcv() no longer calls skb_clone_and_charge_r() for
TCP_LISTEN since commit 073d89808c06 ("net: fix data-races around
sk->sk_forward_alloc").

However, there is still a small race window between tcp_v6_rcv()
and tcp_v6_do_rcv(), where concurrent close() changes TCP_LISTEN
to TCP_CLOSE, causing skb_clone_and_charge_r() to be called
locklessly and resulting in the splat below. [0]

Let's avoid calling skb_clone_and_charge_r() for TCP_CLOSE as well.

This is fine for non-listeners because tcp_rcv_state_process()
drops skb for TCP_CLOSE and opt_skb was freed immediately anyway.

[0]:
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162, CPU#1: ksoftirqd/1/28
Modules linked in:
CPU: 1 UID: 0 PID: 28 Comm: ksoftirqd/1 Not tainted 7.2.0 #17 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014
RIP: 0010:inet_sock_destruct+0x64d/0x810 net/ipv4/af_inet.c:162
Code: 3d 49 ff e9 06 fd ff ff e8 d0 5b 83 f8 90 0f 0b 90 e9 35 fe ff ff e8 c2 5b 83 f8 90 0f 0b 90 e9 c5 fe ff ff e8 b4 5b 83 f8 90 <0f> 0b 90 e9 04 ff ff ff e8 a6 5b 83 f8 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000677bb8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880117bde80 RCX: ffffffff8957eb41
RDX: ffff88801dad5d00 RSI: ffffffff8957ec3c RDI: 0000000000000005
RBP: 00000000fffff000 R08: ffffffff8957eb41 R09: 00000000fffff000
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880117bdf10 R14: ffffffff81c08eb7 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8880d7ae5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f93a1021138 CR3: 00000000207a9000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __sk_destruct+0x82/0xae0 net/core/sock.c:2356
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x59c/0x1100 kernel/rcu/tree.c:2897
 handle_softirqs+0x1e4/0x9b0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1076 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1068
 smpboot_thread_fn+0x458/0xc80 kernel/smpboot.c:160
 kthread+0x396/0x4a0 kernel/kthread.c:436
 ret_from_fork+0x8e0/0xe40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

## Remediation

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