{"cve":"CVE-2022-50271","nvd":{"published":"2025-09-15T15:15:37.930","modified":"2026-06-17T05:23:07.423","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost/vsock: Use kvmalloc/kvfree for larger packets.\n\nWhen copying a large file over sftp over vsock, data size is usually 32kB,\nand kmalloc seems to fail to try to allocate 32 32kB regions.\n\n vhost-5837: page allocation failure: order:4, mode:0x24040c0\n Call Trace:\n  [<ffffffffb6a0df64>] dump_stack+0x97/0xdb\n  [<ffffffffb68d6aed>] warn_alloc_failed+0x10f/0x138\n  [<ffffffffb68d868a>] ? __alloc_pages_direct_compact+0x38/0xc8\n  [<ffffffffb664619f>] __alloc_pages_nodemask+0x84c/0x90d\n  [<ffffffffb6646e56>] alloc_kmem_pages+0x17/0x19\n  [<ffffffffb6653a26>] kmalloc_order_trace+0x2b/0xdb\n  [<ffffffffb66682f3>] __kmalloc+0x177/0x1f7\n  [<ffffffffb66e0d94>] ? copy_from_iter+0x8d/0x31d\n  [<ffffffffc0689ab7>] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock]\n  [<ffffffffc06828d9>] vhost_worker+0xf7/0x157 [vhost]\n  [<ffffffffb683ddce>] kthread+0xfd/0x105\n  [<ffffffffc06827e2>] ? vhost_dev_set_owner+0x22e/0x22e [vhost]\n  [<ffffffffb683dcd1>] ? flush_kthread_worker+0xf3/0xf3\n  [<ffffffffb6eb332e>] ret_from_fork+0x4e/0x80\n  [<ffffffffb683dcd1>] ? flush_kthread_worker+0xf3/0xf3\n\nWork around by doing kvmalloc instead.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837ba","https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8","https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526b","https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320","https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:08:41.295252406+00:00"},"epss":{"cve":"CVE-2022-50271","score":0.0016,"percentile":0.05106,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}