vhost/vsock: Use kvmalloc/kvfree for larger packets.

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.

Scores

EPSS (exploitation in 30 days)

0.16% · top 95% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

• Linux · Linux

  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < 0d720c3f0a03e97867deab7e480ba3d3e19837ba
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < 7aac8c63f604e6a6a46560c0f0188cd0332cf320
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < e6d0152c95108651f1880c1ddfab47cb9e3e62d0
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < b4a5905fd2ef841cd61e969ea692c213c2e5c1f7
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < e28a4e7f0296824c61a81e7fd54ab48bad3e75ad
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < a99fc6d818161d6f1ff3307de8bf5237f6cc34d8
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < 36c9f340c60413e28f980c0224c4e9d35851526b
  • affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 – < 0e3f72931fc47bb81686020cc643cde5d9cd0bb8

• Linux · Linux

  • affected 4.8
  • unaffected < 4.8
  • unaffected 4.14.296 – ≤ 4.14.*
  • unaffected 4.19.262 – ≤ 4.19.*
  • unaffected 5.4.220 – ≤ 5.4.*
  • unaffected 5.10.150 – ≤ 5.10.*
  • unaffected 5.15.75 – ≤ 5.15.*
  • unaffected 5.19.17 – ≤ 5.19.*
  • unaffected 6.0.3 – ≤ 6.0.*
  • unaffected 6.1 – ≤ *

References (8)

• https://git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837ba (opens in a new tab)
• https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320 (opens in a new tab)
• https://git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0 (opens in a new tab)
• https://git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7 (opens in a new tab)
• https://git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75ad (opens in a new tab)
• https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8 (opens in a new tab)
• https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526b (opens in a new tab)
• https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-50271](https://trackcve.app/badge/CVE-2022-50271.svg)](https://trackcve.app/cve/CVE-2022-50271)

Record last updated 11 May 2026, 19:16 UTC.