---
id: CVE-2022-49094
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/tls: fix slab-out-of-bounds bug in decrypt_internal

  The memory size of tls_ctx->rx.iv for AES128-CCM is 12 setting in
  tls_set_sw_offload()
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net/tls: fix slab-out-of-bounds bug in decrypt_internal

  The memory size of tls_ctx->rx.iv for AES128-CCM is 12 setting in
  tls_set_sw_offload(). The return value of cry…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-125
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.2, < 5.4.189'
  - 'linux_kernel >= 5.5, < 5.10.111'
  - 'linux_kernel >= 5.11, < 5.15.34'
  - 'linux_kernel >= 5.16, < 5.16.20'
  - 'linux_kernel >= 5.17, < 5.17.3'
  - linux_kernel = 5.18
patched:
  - linux_kernel 5.17.3
published: '2025-02-26'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:17:23.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-49094'
references:
  - url: 'https://git.kernel.org/stable/c/2304660ab6c425df64d95301b601424c6a50f28b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/29be1816cbab9a0dc6243120939fd10a92753756'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2b7d14c105dd8f6412eda5a91e1e6154653731e3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/589154d0f18945f41d138a5b4e49e518d294474b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e2f1b033b17dedda51d465861b69e58317d6343'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9381fe8c849cfbe50245ac01fc077554f6eaa0e2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.0067
epssPercentile: 0.51768
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-15T21:17:38.615000Z'
ingestedAt: '2026-10-15T21:45:11.291Z'
---

## Overview

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

net/tls: fix slab-out-of-bounds bug in decrypt_internal

The memory size of tls_ctx->rx.iv for AES128-CCM is 12 setting in
tls_set_sw_offload(). The return value of crypto_aead_ivsize()
for "ccm(aes)" is 16. So memcpy() require 16 bytes from 12 bytes
memory space will trigger slab-out-of-bounds bug as following:

==================================================================
BUG: KASAN: slab-out-of-bounds in decrypt_internal+0x385/0xc40 [tls]
Read of size 16 at addr ffff888114e84e60 by task tls/10911

Call Trace:
 <TASK>
 dump_stack_lvl+0x34/0x44
 print_report.cold+0x5e/0x5db
 ? decrypt_internal+0x385/0xc40 [tls]
 kasan_report+0xab/0x120
 ? decrypt_internal+0x385/0xc40 [tls]
 kasan_check_range+0xf9/0x1e0
 memcpy+0x20/0x60
 decrypt_internal+0x385/0xc40 [tls]
 ? tls_get_rec+0x2e0/0x2e0 [tls]
 ? process_rx_list+0x1a5/0x420 [tls]
 ? tls_setup_from_iter.constprop.0+0x2e0/0x2e0 [tls]
 decrypt_skb_update+0x9d/0x400 [tls]
 tls_sw_recvmsg+0x3c8/0xb50 [tls]

Allocated by task 10911:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x81/0xa0
 tls_set_sw_offload+0x2eb/0xa20 [tls]
 tls_setsockopt+0x68c/0x700 [tls]
 __sys_setsockopt+0xfe/0x1b0

Replace the crypto_aead_ivsize() with prot->iv_size + prot->salt_size
when memcpy() iv value in TLS_1_3_VERSION scenario.

## Affected

- `linux_kernel >= 5.2, < 5.4.189`
- `linux_kernel >= 5.5, < 5.10.111`
- `linux_kernel >= 5.11, < 5.15.34`
- `linux_kernel >= 5.16, < 5.16.20`
- `linux_kernel >= 5.17, < 5.17.3`
- `linux_kernel = 5.18`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.17.3`