CVE-2022-50271 (GCVE-0-2022-50271)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-11 19:16
VLAI
Title
vhost/vsock: Use kvmalloc/kvfree for larger packets.
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < 0d720c3f0a03e97867deab7e480ba3d3e19837ba (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < 7aac8c63f604e6a6a46560c0f0188cd0332cf320 (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < e6d0152c95108651f1880c1ddfab47cb9e3e62d0 (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < b4a5905fd2ef841cd61e969ea692c213c2e5c1f7 (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < e28a4e7f0296824c61a81e7fd54ab48bad3e75ad (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < a99fc6d818161d6f1ff3307de8bf5237f6cc34d8 (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < 36c9f340c60413e28f980c0224c4e9d35851526b (git)
Affected: 433fc58e6bf2c8bd97e57153ed28e64fd78207b8 , < 0e3f72931fc47bb81686020cc643cde5d9cd0bb8 (git)
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Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 4.14.296 , ≤ 4.14.* (semver)
Unaffected: 4.19.262 , ≤ 4.19.* (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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          {
            "lang": "en",
            "value": "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  [\u003cffffffffb6a0df64\u003e] dump_stack+0x97/0xdb\n  [\u003cffffffffb68d6aed\u003e] warn_alloc_failed+0x10f/0x138\n  [\u003cffffffffb68d868a\u003e] ? __alloc_pages_direct_compact+0x38/0xc8\n  [\u003cffffffffb664619f\u003e] __alloc_pages_nodemask+0x84c/0x90d\n  [\u003cffffffffb6646e56\u003e] alloc_kmem_pages+0x17/0x19\n  [\u003cffffffffb6653a26\u003e] kmalloc_order_trace+0x2b/0xdb\n  [\u003cffffffffb66682f3\u003e] __kmalloc+0x177/0x1f7\n  [\u003cffffffffb66e0d94\u003e] ? copy_from_iter+0x8d/0x31d\n  [\u003cffffffffc0689ab7\u003e] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock]\n  [\u003cffffffffc06828d9\u003e] vhost_worker+0xf7/0x157 [vhost]\n  [\u003cffffffffb683ddce\u003e] kthread+0xfd/0x105\n  [\u003cffffffffc06827e2\u003e] ? vhost_dev_set_owner+0x22e/0x22e [vhost]\n  [\u003cffffffffb683dcd1\u003e] ? flush_kthread_worker+0xf3/0xf3\n  [\u003cffffffffb6eb332e\u003e] ret_from_fork+0x4e/0x80\n  [\u003cffffffffb683dcd1\u003e] ? flush_kthread_worker+0xf3/0xf3\n\nWork around by doing kvmalloc instead."
          }
        ],
        "id": "CVE-2022-50271",
        "lastModified": "2026-06-17T05:23:07.423",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-09-15T15:15:37.930",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837ba"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75ad"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:37:40+00:00",
      "cve": "CVE-2022-50271",
      "id": "CVE-2022-50271",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "66",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service due to memory allocation failure in vhost/vsock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50271.json",
      "version": "3"
    }
  }
}



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