---
id: CVE-2024-56650
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: x_tables: fix LED ID check in led_tg_check()

  Syzbot has reported the following BUG detected by KASAN:

  BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70
  Re…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: x_tables: fix LED ID check in led_tg_check()

  Syzbot has reported the following BUG detected by KASAN:

  BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70
  Re…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-125
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.30, < 5.4.287'
  - 'linux_kernel >= 5.5, < 5.10.231'
  - 'linux_kernel >= 5.11, < 5.15.174'
  - 'linux_kernel >= 5.16, < 6.1.120'
  - 'linux_kernel >= 6.2, < 6.6.66'
  - 'linux_kernel >= 6.7, < 6.12.5'
  - linux_kernel = 6.13
patched:
  - linux_kernel 6.12.5
published: '2024-12-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:17:08.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-56650'
references:
  - url: 'https://git.kernel.org/stable/c/04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/147a42bb02de8735cb08476be6d0917987d022c2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/36a9d94dac28beef6b8abba46ba8874320d3e800'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a9bcc0b70d9baf3ff005874489a0dc9d023b54c3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ab9916321c95f5280b72b4c5055e269f98627efe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ad28612ebae1fcc1104bd432e99e99d87f6bfe09'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c40c96d98e536fc1daaa125c2332b988615e30a4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-355557.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00263
epssPercentile: 0.16835
ingestedAt: '2026-10-15T03:30:12.775Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-10-01T20:00:22.683789Z'
---

## Overview

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

netfilter: x_tables: fix LED ID check in led_tg_check()

Syzbot has reported the following BUG detected by KASAN:

BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70
Read of size 1 at addr ffff8881022da0c8 by task repro/5879
...
Call Trace:
 <TASK>
 dump_stack_lvl+0x241/0x360
 ? __pfx_dump_stack_lvl+0x10/0x10
 ? __pfx__printk+0x10/0x10
 ? _printk+0xd5/0x120
 ? __virt_addr_valid+0x183/0x530
 ? __virt_addr_valid+0x183/0x530
 print_report+0x169/0x550
 ? __virt_addr_valid+0x183/0x530
 ? __virt_addr_valid+0x183/0x530
 ? __virt_addr_valid+0x45f/0x530
 ? __phys_addr+0xba/0x170
 ? strlen+0x58/0x70
 kasan_report+0x143/0x180
 ? strlen+0x58/0x70
 strlen+0x58/0x70
 kstrdup+0x20/0x80
 led_tg_check+0x18b/0x3c0
 xt_check_target+0x3bb/0xa40
 ? __pfx_xt_check_target+0x10/0x10
 ? stack_depot_save_flags+0x6e4/0x830
 ? nft_target_init+0x174/0xc30
 nft_target_init+0x82d/0xc30
 ? __pfx_nft_target_init+0x10/0x10
 ? nf_tables_newrule+0x1609/0x2980
 ? nf_tables_newrule+0x1609/0x2980
 ? rcu_is_watching+0x15/0xb0
 ? nf_tables_newrule+0x1609/0x2980
 ? nf_tables_newrule+0x1609/0x2980
 ? __kmalloc_noprof+0x21a/0x400
 nf_tables_newrule+0x1860/0x2980
 ? __pfx_nf_tables_newrule+0x10/0x10
 ? __nla_parse+0x40/0x60
 nfnetlink_rcv+0x14e5/0x2ab0
 ? __pfx_validate_chain+0x10/0x10
 ? __pfx_nfnetlink_rcv+0x10/0x10
 ? __lock_acquire+0x1384/0x2050
 ? netlink_deliver_tap+0x2e/0x1b0
 ? __pfx_lock_release+0x10/0x10
 ? netlink_deliver_tap+0x2e/0x1b0
 netlink_unicast+0x7f8/0x990
 ? __pfx_netlink_unicast+0x10/0x10
 ? __virt_addr_valid+0x183/0x530
 ? __check_object_size+0x48e/0x900
 netlink_sendmsg+0x8e4/0xcb0
 ? __pfx_netlink_sendmsg+0x10/0x10
 ? aa_sock_msg_perm+0x91/0x160
 ? __pfx_netlink_sendmsg+0x10/0x10
 __sock_sendmsg+0x223/0x270
 ____sys_sendmsg+0x52a/0x7e0
 ? __pfx_____sys_sendmsg+0x10/0x10
 __sys_sendmsg+0x292/0x380
 ? __pfx___sys_sendmsg+0x10/0x10
 ? lockdep_hardirqs_on_prepare+0x43d/0x780
 ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10
 ? exc_page_fault+0x590/0x8c0
 ? do_syscall_64+0xb6/0x230
 do_syscall_64+0xf3/0x230
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
...
 </TASK>

Since an invalid (without '\0' byte at all) byte sequence may be passed
from userspace, add an extra check to ensure that such a sequence is
rejected as possible ID and so never passed to 'kstrdup()' and further.

## Affected

- `linux_kernel >= 2.6.30, < 5.4.287`
- `linux_kernel >= 5.5, < 5.10.231`
- `linux_kernel >= 5.11, < 5.15.174`
- `linux_kernel >= 5.16, < 6.1.120`
- `linux_kernel >= 6.2, < 6.6.66`
- `linux_kernel >= 6.7, < 6.12.5`
- `linux_kernel = 6.13`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.12.5`