CVE-2026-98086 (GCVE-0-2026-98086)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-10-19 09:13
VLAI
Title
ALSA: ump: do not touch legacy_rmidi before it exists
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: do not touch legacy_rmidi before it exists snd_ump_parse_endpoint() sets ump->parsed on every exit, including error, before the caller attaches the legacy rawmidi device. ump_handle_ep_name_msg() then treats parsed as "legacy_rmidi is live" and calls ump_legacy_set_rawmidi_name(), which snprintf()s into ump->legacy_rmidi->name. If a UMP packet arrives in that window (IRQ path from snd_ump_receive), legacy_rmidi is still NULL (KASAN null-ptr-deref in snprintf). Guard the legacy helpers. parsed only means endpoint info was parsed, not that legacy_rmidi exists.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6996 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < d6f9af093dc91dac8848a01e417b8109c651c0b2 (git)
Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < 1c8e01792adf91879322f1ad752f1814de8b7e7d (git)
Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < 228075f31b141395233218712242913125ace4e0 (git)
Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < a4cef20cd473e0640fefd38094d4baac0ec76ae3 (git)
Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < adeee7187694719890aaffdc14b7e89cfd736f1d (git)
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Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/core/ump.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "6.5"
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              "status": "unaffected",
              "version": "0",
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              "version": "6.6.158",
              "versionType": "semver"
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              "version": "6.12.111",
              "versionType": "semver"
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              "versionType": "semver"
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              "version": "7.2.7",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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-\u003eparsed 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-\u003elegacy_rmidi-\u003ename. 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:13:38.462Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/d6f9af093dc91dac8848a01e417b8109c651c0b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3"
        },
        {
          "url": "https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d"
        }
      ],
      "title": "ALSA: ump: do not touch legacy_rmidi before it exists",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98086",
    "datePublished": "2026-09-25T10:24:21.086Z",
    "dateReserved": "2026-09-25T10:19:56.075Z",
    "dateUpdated": "2026-10-19T09:13:38.462Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "id": "msrc_CVE-2026-98086",
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      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ALSA: ump: do not touch legacy_rmidi before it exists",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98086.json",
      "version": "3"
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                ],
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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-\u003eparsed 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-\u003elegacy_rmidi-\u003ename. 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."
          }
        ],
        "id": "CVE-2026-98086",
        "lastModified": "2026-10-19T10:18:04.883",
        "metrics": {},
        "published": "2026-09-25T11:17:38.200",
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        "vulnStatus": "Undergoing Analysis"
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      "current_release_date": "2026-10-01T16:04:43Z",
      "cve": "CVE-2026-98086",
      "id": "CVE-2026-98086",
      "initial_release_date": "2026-10-01T16:04:43Z",
      "product_status:known_not_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98086",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98086.json",
      "version": "2"
    }
  }
}



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