---
id: CVE-2024-36939
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfs: Handle error of rpc_proc_register() in nfs_net_init().

  syzkaller reported a warning [0] triggered while destroying immature
  netns.

  rpc_proc_register() was called…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nfs: Handle error of rpc_proc_register() in nfs_net_init().

  syzkaller reported a warning [0] triggered while destroying immature
  netns.

  rpc_proc_register() was called…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.13, < 5.4.276'
  - 'linux_kernel >= 5.5, < 5.10.217'
  - 'linux_kernel >= 5.11, < 5.15.159'
  - 'linux_kernel >= 5.16, < 6.1.91'
  - 'linux_kernel >= 6.2, < 6.6.31'
  - 'linux_kernel >= 6.7, < 6.8.10'
  - linux_kernel = 2.6.12
  - linux_kernel = 6.9
  - debian_linux = 10.0
patched:
  - linux_kernel 6.8.10
published: '2024-05-30'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:18:26.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-36939'
references:
  - url: 'https://git.kernel.org/stable/c/24457f1be29f1e7042e50a7749f5c2dde8c433c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8a1f89c98dcc542dd6d287e573523714702e0f9c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8ae63bd858691bee0e2a92571f2fbb36a4d86d65'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9909dde2e53a19585212c32fe3eda482b5faaaa3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b33ca18c3a1190208dfd569c4fa8a2f93084709f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d4891d817350c67392d4731536945f3809a2a0ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ea6ce93327bd2c8a0c6cf6f2f0e800f3b778f021'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/24457f1be29f1e7042e50a7749f5c2dde8c433c8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/8a1f89c98dcc542dd6d287e573523714702e0f9c'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/8ae63bd858691bee0e2a92571f2fbb36a4d86d65'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/9909dde2e53a19585212c32fe3eda482b5faaaa3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/b33ca18c3a1190208dfd569c4fa8a2f93084709f'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/d4891d817350c67392d4731536945f3809a2a0ba'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/ea6ce93327bd2c8a0c6cf6f2f0e800f3b778f021'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00233
epssPercentile: 0.14093
ingestedAt: '2026-10-15T03:30:12.702Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-06-03T18:55:43.324430Z'
---

## Overview

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

nfs: Handle error of rpc_proc_register() in nfs_net_init().

syzkaller reported a warning [0] triggered while destroying immature
netns.

rpc_proc_register() was called in init_nfs_fs(), but its error
has been ignored since at least the initial commit 1da177e4c3f4
("Linux-2.6.12-rc2").

Recently, commit d47151b79e32 ("nfs: expose /proc/net/sunrpc/nfs
in net namespaces") converted the procfs to per-netns and made
the problem more visible.

Even when rpc_proc_register() fails, nfs_net_init() could succeed,
and thus nfs_net_exit() will be called while destroying the netns.

Then, remove_proc_entry() will be called for non-existing proc
directory and trigger the warning below.

Let's handle the error of rpc_proc_register() properly in nfs_net_init().

[0]:
name 'nfs'
WARNING: CPU: 1 PID: 1710 at fs/proc/generic.c:711 remove_proc_entry+0x1bb/0x2d0 fs/proc/generic.c:711
Modules linked in:
CPU: 1 PID: 1710 Comm: syz-executor.2 Not tainted 6.8.0-12822-gcd51db110a7e #12
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
RIP: 0010:remove_proc_entry+0x1bb/0x2d0 fs/proc/generic.c:711
Code: 41 5d 41 5e c3 e8 85 09 b5 ff 48 c7 c7 88 58 64 86 e8 09 0e 71 02 e8 74 09 b5 ff 4c 89 e6 48 c7 c7 de 1b 80 84 e8 c5 ad 97 ff <0f> 0b eb b1 e8 5c 09 b5 ff 48 c7 c7 88 58 64 86 e8 e0 0d 71 02 eb
RSP: 0018:ffffc9000c6d7ce0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880422b8b00 RCX: ffffffff8110503c
RDX: ffff888030652f00 RSI: ffffffff81105045 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff81bb62cb R12: ffffffff84807ffc
R13: ffff88804ad6fcc0 R14: ffffffff84807ffc R15: ffffffff85741ff8
FS:  00007f30cfba8640(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff51afe8000 CR3: 000000005a60a005 CR4: 0000000000770ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 <TASK>
 rpc_proc_unregister+0x64/0x70 net/sunrpc/stats.c:310
 nfs_net_exit+0x1c/0x30 fs/nfs/inode.c:2438
 ops_exit_list+0x62/0xb0 net/core/net_namespace.c:170
 setup_net+0x46c/0x660 net/core/net_namespace.c:372
 copy_net_ns+0x244/0x590 net/core/net_namespace.c:505
 create_new_namespaces+0x2ed/0x770 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xae/0x160 kernel/nsproxy.c:228
 ksys_unshare+0x342/0x760 kernel/fork.c:3322
 __do_sys_unshare kernel/fork.c:3393 [inline]
 __se_sys_unshare kernel/fork.c:3391 [inline]
 __x64_sys_unshare+0x1f/0x30 kernel/fork.c:3391
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x4f/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x46/0x4e
RIP: 0033:0x7f30d0febe5d
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 9f 1b 00 f7 d8 64 89 01 48
RSP: 002b:00007f30cfba7cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00000000004bbf80 RCX: 00007f30d0febe5d
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c020600
RBP: 00000000004bbf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f30d104c530 R15: 0000000000000000
 </TASK>

## Affected

- `linux_kernel >= 2.6.13, < 5.4.276`
- `linux_kernel >= 5.5, < 5.10.217`
- `linux_kernel >= 5.11, < 5.15.159`
- `linux_kernel >= 5.16, < 6.1.91`
- `linux_kernel >= 6.2, < 6.6.31`
- `linux_kernel >= 6.7, < 6.8.10`
- `linux_kernel = 2.6.12`
- `linux_kernel = 6.9`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.8.10`