FKIE_CVE-2026-98086

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/core/ump.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1c8e01792adf91879322f1ad752f1814de8b7e7d",
              "status": "affected",
              "version": "37e0e14128e0685267dc5c037bf655421a6ce2ea",
              "versionType": "git"
            },
            {
              "lessThan": "228075f31b141395233218712242913125ace4e0",
              "status": "affected",
              "version": "37e0e14128e0685267dc5c037bf655421a6ce2ea",
              "versionType": "git"
            },
            {
              "lessThan": "a4cef20cd473e0640fefd38094d4baac0ec76ae3",
              "status": "affected",
              "version": "37e0e14128e0685267dc5c037bf655421a6ce2ea",
              "versionType": "git"
            },
            {
              "lessThan": "adeee7187694719890aaffdc14b7e89cfd736f1d",
              "status": "affected",
              "version": "37e0e14128e0685267dc5c037bf655421a6ce2ea",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/core/ump.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "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": "2026-09-25T11:17:38.200",
  "metrics": {},
  "published": "2026-09-25T11:17:38.200",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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