CVE-2022-50271

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

State: Published
Severity: Not scored
Published: Sep 15, 2025
Updated: May 11, 2026
Reserved: Sep 15, 2025

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

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 0d720c3f0a03e97867deab7e480ba3d3e19837baAffected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 7aac8c63f604e6a6a46560c0f0188cd0332cf320Affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before e6d0152c95108651f1880c1ddfab47cb9e3e62d0Affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before b4a5905fd2ef841cd61e969ea692c213c2e5c1f7Affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before e28a4e7f0296824c61a81e7fd54ab48bad3e75adAffected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before a99fc6d818161d6f1ff3307de8bf5237f6cc34d8Affected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 36c9f340c60413e28f980c0224c4e9d35851526bAffected 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 0e3f72931fc47bb81686020cc643cde5d9cd0bb8Affected
LinuxLinux	4.8Affected before 4.8Not affected 4.14.296 through 4.14.Not affected 4.19.262 through 4.19.Not affected 5.4.220 through 5.4.Not affected 5.10.150 through 5.10.Not affected 5.15.75 through 5.15.Not affected 5.19.17 through 5.19.Not affected 6.0.3 through 6.0.*Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 0d720c3f0a03e97867deab7e480ba3d3e19837baAffected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 7aac8c63f604e6a6a46560c0f0188cd0332cf320Affected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before e6d0152c95108651f1880c1ddfab47cb9e3e62d0Affected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before b4a5905fd2ef841cd61e969ea692c213c2e5c1f7Affected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before e28a4e7f0296824c61a81e7fd54ab48bad3e75adAffected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before a99fc6d818161d6f1ff3307de8bf5237f6cc34d8Affected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 36c9f340c60413e28f980c0224c4e9d35851526bAffected
433fc58e6bf2c8bd97e57153ed28e64fd78207b8 to before 0e3f72931fc47bb81686020cc643cde5d9cd0bb8Affected

LinuxLinux

4.8Affected
before 4.8Not affected
4.14.296 through 4.14.*Not affected
4.19.262 through 4.19.*Not affected
5.4.220 through 5.4.*Not affected
5.10.150 through 5.10.*Not affected
5.15.75 through 5.15.*Not affected
5.19.17 through 5.19.*Not affected
6.0.3 through 6.0.*Not affected
6.1 and laterNot affected

References

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