{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89511",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-89511"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "qede: Fix NULL pointer dereference in TPA fragment processing",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nqede: Fix NULL pointer dereference in TPA fragment processing\n\nUnder memory pressure, the qede driver encounters NULL pointer\ndereferences when processing TPA continuation fragments.\n\nCommit 8a8633978b84 (\"qede: Add build_skb() support.\") accidentally\ndropped the assignment of tpa_info->buffer.data in qede_tpa_start().\n\nWhen memory pressure causes an SKB allocation failure in qede_tpa_start(),\nthe driver sets tpa_start_fail = true and attempts to recycle the physical\npage later in qede_tpa_end() via qede_reuse_page(). However, because\nbuffer.data was left uninitialized (NULL), qede_reuse_page() pushes a\n\"ghost\" BD (valid DMA mapping but NULL data pointer) back into the\nactive Rx ring.\n\nThe next time the hardware uses this ring slot, it passes a NULL page\nto qede_fill_frag_skb(), causing a kernel panic.\n\nExample crash from production system:\n BUG: unable to handle kernel NULL pointer dereference at 0x8\n RIP: qede_fill_frag_skb+0x96/0x430 [qede]\n Call Trace:\n   qede_rx_int+0xb06/0x1de0\n   qede_poll+0x2f4/0x6c0\n   __napi_poll+0x2d/0x130\n\nFix the root cause by restoring the tpa_info->buffer.data assignment\nin qede_tpa_start(), ensuring valid pages are correctly tracked and\nrecycled. Additionally, update the stale comment for\nstruct qede_agg_info::buffer to reflect its current usage.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89511"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e2214e2793154b745436e46c6a9a7985d9b3781d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dd8bc0a9d87d2b048711edd17ba7286432edd285"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fa7c9bd2c4a8de167e2fb32968ca4d91dd774375"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a5e1fdc126ab337d601d1a00cc4b47910679d005"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7f911e208b3ca2c76d9f2bbba1f54b9403568c10"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2a952fb1b20d83e83ca852773e6188511f7d2191"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f5c8619ccbd70102642120c4c6fda1c048a555fd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/06aa3d26327f24edd039ff249672fdf6f2ba5695"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
  }
}