gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL

{
  "id": "b3f476a2979a0373ad6f8eca8b45fd3fb411e1f55b39537fee6dff5644851ccb",
  "url": "https://osv.dev/vulnerability/CVE-2026-23386",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gve: fix incorrect buffer cleanup in gve_tx_clean_pending_packets for QPL In DQ-QPL mode, gve_tx_clean_pending_packets() incorrectly uses the RDA buffer cleanup path. It iterates num_bufs times and attempts to unmap entries in the dma array. This leads to two issues: 1. The dma array shares storage with tx_qpl_buf_ids (union). Interpreting buffer IDs as DMA addresses results in attempting to unmap incorrect memory locations. 2. num_bufs in QPL mode (counting 2K chunks) can significantly exceed the size of the dma array, causing out-of-bounds access warnings (trace below is how we noticed this issue). UBSAN: array-index-out-of-bounds in drivers/net/ethernet/drivers/net/ethernet/google/gve/gve_tx_dqo.c:178:5 index 18 is out of range for type 'dma_addr_t[18]' (aka 'unsigned long long[18]') Workqueue: gve gve_service_task [gve] Call Trace: dump_stack_lvl+0x33/0xa0 __ubsan_handle_out_of_bounds+0xdc/0x110 gve_tx_stop_ring_dqo+0x182/0x200 [gve] gve_close+0x1be/0x450 [gve] gve_reset+0x99/0x120 [gve] gve_service_task+0x61/0x100 [gve] process_scheduled_works+0x1e9/0x380 Fix this by properly checking for QPL mode and delegating to gve_free_tx_qpl_bufs() to reclaim the buffers.",
    "evidence": "osv:CVE-2026-23386",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23386",
      "aliases": [
        "CVE-2026-23386"
      ],
      "affected": [
        {
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              "type": "GIT",
              "events": [
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                },
                {
                  "fixed": "71511dae56a75ce161aa746741e5c498feaea393"
                },
                {
                  "fixed": "c171f90f58974c784db25e0606051541cb71b7f0"
                },
                {
                  "fixed": "07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f"
                },
                {
                  "fixed": "3744ebd8ffaa542ae8110fb449adcac0202f4cc8"
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                  "fixed": "fb868db5f4bccd7a78219313ab2917429f715cea"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23386.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
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                  "fixed": "6.6.130"
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            {
              "type": "ECOSYSTEM",
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              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.17"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.7"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23386.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.051409834Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f",
        "https://git.kernel.org/stable/c/3744ebd8ffaa542ae8110fb449adcac0202f4cc8",
        "https://git.kernel.org/stable/c/71511dae56a75ce161aa746741e5c498feaea393",
        "https://git.kernel.org/stable/c/c171f90f58974c784db25e0606051541cb71b7f0",
        "https://git.kernel.org/stable/c/fb868db5f4bccd7a78219313ab2917429f715cea",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23386.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23386",
        "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/2026/23xxx/CVE-2026-23386.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23386",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 486990,
  "published_at": "2026-03-25T10:28:04.118+00:00"
}