mt76: fix monitor mode crash with sdio driver

{
  "id": "22c2d58c5aa311329fa8293d39b2bb4aec86e8456ba8742030a1ad3ff3975cfa",
  "url": "https://osv.dev/vulnerability/CVE-2022-49112",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mt76: fix monitor mode crash with sdio driver",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mt76: fix monitor mode crash with sdio driver mt7921s driver may receive frames with fragment buffers. If there is a CTS packet received in monitor mode, the payload is 10 bytes only and need 6 bytes header padding after RXD buffer. However, only RXD in the first linear buffer, if we pull buffer size RXD-size+6 bytes with skb_pull(), that would trigger \"BUG_ON(skb->len < skb->data_len)\" in __skb_pull(). To avoid the nonlinear buffer issue, enlarge the RXD size from 128 to 256 to make sure all MCU operation in linear buffer. [ 52.007562] kernel BUG at include/linux/skbuff.h:2313! [ 52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 52.007987] pc : skb_pull+0x48/0x4c [ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common] [ 52.008361] Call trace: [ 52.008377] skb_pull+0x48/0x4c [ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c] [ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917] [ 52.008449] kthread+0x148/0x3ac [ 52.008466] ret_from_fork+0x10/0x30",
    "evidence": "osv:CVE-2022-49112",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.16.20",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.17.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49112",
      "aliases": [
        "CVE-2022-49112"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "48fab5bbef4092d925ab3214773ad12e68807223"
                },
                {
                  "fixed": "c37b4cab3d97ef64b206fca4d9daabd9aff7356e"
                },
                {
                  "fixed": "95e2af01669c7a3cb7a933cefa06361f9db15059"
                },
                {
                  "fixed": "123bc712b1de0805f9d683687e17b1ec2aba0b68"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49112.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.20"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.17.0"
                },
                {
                  "fixed": "5.17.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49112.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.628423999Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68",
        "https://git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059",
        "https://git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49112.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49112",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49112.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49112",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 488946,
  "published_at": "2025-02-26T01:54:57.109+00:00"
}