ata: sata_dwc_460ex: Fix crash due to OOB write

{
  "id": "3bd38427ee1fdaddc3c9e81a32044c81f3c4dab6b611886b4ee701d6928ab1bc",
  "url": "https://osv.dev/vulnerability/CVE-2022-49073",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ata: sata_dwc_460ex: Fix crash due to OOB write",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ata: sata_dwc_460ex: Fix crash due to OOB write the driver uses libata's \"tag\" values from in various arrays. Since the mentioned patch bumped the ATA_TAG_INTERNAL to 32, the value of the SATA_DWC_QCMD_MAX needs to account for that. Otherwise ATA_TAG_INTERNAL usage cause similar crashes like this as reported by Tice Rex on the OpenWrt Forum and reproduced (with symbols) here: | BUG: Kernel NULL pointer dereference at 0x00000000 | Faulting instruction address: 0xc03ed4b8 | Oops: Kernel access of bad area, sig: 11 [#1] | BE PAGE_SIZE=4K PowerPC 44x Platform | CPU: 0 PID: 362 Comm: scsi_eh_1 Not tainted 5.4.163 #0 | NIP: c03ed4b8 LR: c03d27e8 CTR: c03ed36c | REGS: cfa59950 TRAP: 0300 Not tainted (5.4.163) | MSR: 00021000 CR: 42000222 XER: 00000000 | DEAR: 00000000 ESR: 00000000 | GPR00: c03d27e8 cfa59a08 cfa55fe0 00000000 0fa46bc0 [...] | [..] | NIP [c03ed4b8] sata_dwc_qc_issue+0x14c/0x254 | LR [c03d27e8] ata_qc_issue+0x1c8/0x2dc | Call Trace: | [cfa59a08] [c003f4e0] __cancel_work_timer+0x124/0x194 (unreliable) | [cfa59a78] [c03d27e8] ata_qc_issue+0x1c8/0x2dc | [cfa59a98] [c03d2b3c] ata_exec_internal_sg+0x240/0x524 | [cfa59b08] [c03d2e98] ata_exec_internal+0x78/0xe0 | [cfa59b58] [c03d30fc] ata_read_log_page.part.38+0x1dc/0x204 | [cfa59bc8] [c03d324c] ata_identify_page_supported+0x68/0x130 | [...] This is because sata_dwc_dma_xfer_complete() NULLs the dma_pending's next neighbour \"chan\" (a *dma_chan struct) in th",
    "evidence": "osv:CVE-2022-49073",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "4.19.238",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49073",
      "aliases": [
        "CVE-2022-49073"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49073.json"
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      ],
      "modified": "2026-10-28T02:30:23.736322756Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/234c0132f76f0676d175757f61b0025191a3d935",
        "https://git.kernel.org/stable/c/3a8751c0d4e24129e72dcec0139e99833b13904a",
        "https://git.kernel.org/stable/c/55e1465ba79562a191708a40eeae3f8082a209e3",
        "https://git.kernel.org/stable/c/596c7efd69aae94f4b0e91172b075eb197958b99",
        "https://git.kernel.org/stable/c/7aa8104a554713b685db729e66511b93d989dd6a",
        "https://git.kernel.org/stable/c/8a05a6952ecd59aaa62cbdcdaf523ae2c8f436e8",
        "https://git.kernel.org/stable/c/fc629224aa62f23849cae83717932985ac51232d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49073.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49073",
        "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-2022-49073.json"
      }
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    "related_cves": [
      {
        "value": "CVE-2022-49073",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489876,
  "published_at": "2025-02-26T01:54:37.804+00:00"
}