{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-98086",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2026-98086"
  ],
  "published": "2026-09-25T10:24:31Z",
  "summary": "ALSA: ump: do not touch legacy_rmidi before it exists",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ump: do not touch legacy_rmidi before it exists\n\nsnd_ump_parse_endpoint() sets ump->parsed on every exit, including\nerror, before the caller attaches the legacy rawmidi device.\nump_handle_ep_name_msg() then treats parsed as \"legacy_rmidi is live\"\nand calls ump_legacy_set_rawmidi_name(), which snprintf()s into\nump->legacy_rmidi->name. If a UMP packet arrives in that window\n(IRQ path from snd_ump_receive), legacy_rmidi is still NULL\n(KASAN null-ptr-deref in snprintf).\n\nGuard the legacy helpers. parsed only means endpoint info was\nparsed, not that legacy_rmidi exists.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:13",
        "name": "linux"
      },
      "versions": [
        "1:6.18.39-1+rpt1",
        "1:6.18.50-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.18.39+rpt-rpi-2712",
            "binary_version": "1:6.18.39-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.39+rpt-rpi-v6",
            "binary_version": "1:6.18.39-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.39+rpt-rpi-v7",
            "binary_version": "1:6.18.39-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.39+rpt-rpi-v8",
            "binary_version": "1:6.18.39-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.39+rpt-rpi-v8-rt",
            "binary_version": "1:6.18.39-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.50+rpt-rpi-2712",
            "binary_version": "1:6.18.50-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.50+rpt-rpi-v6",
            "binary_version": "1:6.18.50-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.50+rpt-rpi-v7",
            "binary_version": "1:6.18.50-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.50+rpt-rpi-v8",
            "binary_version": "1:6.18.50-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.18.50+rpt-rpi-v8-rt",
            "binary_version": "1:6.18.50-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.18.39-1+rpt1": {
            "linux_commit": "60ea684a8ace97bb0db1a16e20753bdd6ab371ff",
            "upstream_version": "6.18.39",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.53"
          },
          "1:6.18.50-1+rpt1": {
            "linux_commit": "cff533aec2fa601846766b32ff57204e0a61bed7",
            "upstream_version": "6.18.50",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.53"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-98086"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d6f9af093dc91dac8848a01e417b8109c651c0b2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-03T11:04:09Z"
  }
}