CVE-2022-50271

MEDIUM EPSS 4.2%
Published Sep 15, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: vhost/vsock: Use kvmalloc/kvfree for larger packets. When copying a large file over sftp over vsock, data size is usually 32kB, and kmalloc seems to fail to try to allocate 32 32kB regions. vhost-5837: page allocation failure: order:4, mode:0x24040c0 Call Trace: [<ffffffffb6a0df64>] dump_stack+0x97/0xdb [<ffffffffb68d6aed>] warn_alloc_failed+0x10f/0x138 [<ffffffffb68d868a>] ? __alloc_pages_direct_compact+0x38/0xc8 [<ffffffffb664619f>] __alloc_pages_nodemask+0x84c/0x90d [<ffffffffb6646e56>] alloc_kmem_pages+0x17/0x19 [<ffffffffb6653a26>] kmalloc_order_trace+0x2b/0xdb [<ffffffffb66682f3>] __kmalloc+0x177/0x1f7 [<ffffffffb66e0d94>] ? copy_from_iter+0x8d/0x31d [<ffffffffc0689ab7>] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock] [<ffffffffc06828d9>] vhost_worker+0xf7/0x157 [vhost] [<ffffffffb683ddce>] kthread+0xfd/0x105 [<ffffffffc06827e2>] ? vhost_dev_set_owner+0x22e/0x22e [vhost] [<ffffffffb683dcd1>] ? flush_kthread_worker+0xf3/0xf3 [<ffffffffb6eb332e>] ret_from_fork+0x4e/0x80 [<ffffffffb683dcd1>] ? flush_kthread_worker+0xf3/0xf3 Work around by doing kvmalloc instead.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥4.8  –  <4.14.296
linuxlinux_kernel*≥4.15  –  <4.19.262
linuxlinux_kernel*≥4.20  –  <5.4.220
linuxlinux_kernel*≥5.5  –  <5.10.150
linuxlinux_kernel*≥5.11  –  <5.15.75
linuxlinux_kernel*≥5.16  –  <5.19.17
linuxlinux_kernel*≥6.0  –  <6.0.3

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75ad
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75ad
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0
    Patch