CVE-2022-50271

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

MEDIUM

5.5

CVSS Score

Published: September 15, 2025 at 02:21 PM UTC

Updated: June 17, 2026 at 05:23 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.15 ≤ v < 4.19.2624.20 ≤ v < 5.4.2204.8 ≤ v < 4.14.2964.8 ≤ v < 4.19.2624.8 ≤ v < 5.10.1504.8 ≤ v < 5.15.754.8 ≤ v < 5.19.174.8 ≤ v < 5.4.2204.8 ≤ v < 6.0.34.8 ≤ v < 6.15.11 ≤ v < 5.15.755.16 ≤ v < 5.19.175.5 ≤ v < 5.10.1506.0 ≤ v < 6.0.34.8433fc58e6bf2c8bd97e57153ed28e64fd78207b8

Vendor states this is fixed in 0d720c3f0a03e97867deab7e480ba3d3e19837ba (fixed)

Vendor states this is fixed in 0e3f72931fc47bb81686020cc643cde5d9cd0bb8 (fixed)

Vendor states this is fixed in 36c9f340c60413e28f980c0224c4e9d35851526b (fixed)

Vendor states this is fixed in 7aac8c63f604e6a6a46560c0f0188cd0332cf320 (fixed)

Vendor states this is fixed in a99fc6d818161d6f1ff3307de8bf5237f6cc34d8 (fixed)

Vendor states this is fixed in b4a5905fd2ef841cd61e969ea692c213c2e5c1f7 (fixed)

Vendor states this is fixed in e28a4e7f0296824c61a81e7fd54ab48bad3e75ad (fixed)

Vendor states this is fixed in e6d0152c95108651f1880c1ddfab47cb9e3e62d0 (fixed)

Vendor states this is fixed in 4.14.296 (unaffected)

Vendor states this is fixed in 4.19.262 (unaffected)

Vendor states this is fixed in 4.8 (unaffected)

Vendor states this is fixed in 5.10.150 (unaffected)