Vulnerability-Lookup

GHSA-54Q5-26WC-PGP6

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98086"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:38Z",
    "severity": null
  },
  "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-\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": "GHSA-54q5-26wc-pgp6",
  "modified": "2026-09-25T12:31:36Z",
  "published": "2026-09-25T12:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98086"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24

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 mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/1c8e01792adf91879…
https://git.kernel.org/stable/c/228075f31b1413952…
https://git.kernel.org/stable/c/a4cef20cd473e0640…
https://git.kernel.org/stable/c/adeee718769471989…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < 1c8e01792adf91879322f1ad752f1814de8b7e7d (git) Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < 228075f31b141395233218712242913125ace4e0 (git) Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < a4cef20cd473e0640fefd38094d4baac0ec76ae3 (git) Affected: 37e0e14128e0685267dc5c037bf655421a6ce2ea , < adeee7187694719890aaffdc14b7e89cfd736f1d (git)
Linux	Linux	Affected: 6.5 Unaffected: 0 , < 6.5 (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-rc2 , ≤ * (original_commit_for_fix)

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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/core/ump.c"
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          "vendor": "Linux",
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              "lessThan": "228075f31b141395233218712242913125ace4e0",
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          "versions": [
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              "version": "0",
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              "version": "6.18.53",
              "versionType": "semver"
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              "version": "7.2.7",
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    "dateReserved": "2026-09-25T10:19:56.075Z",
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Sightings

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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GHSA-54Q5-26WC-PGP6

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

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