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ALSA: bcd2000: Fix race between rawmidi and disconnect

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ALSA: bcd2000: Fix race between rawmidi and disconnect Although we tried to fix the potential UAF issues at USB disconnect on bcd2000 driver, there is still an overlooked case -- namely, when a rawmidi trigger callback has been already running at USB disconnect handling, the in-flight function (e.g. bcd2000_midi_send()) could still access the URB, because the previous URB NULL-check & clearance was considered only for the URB complete callbacks, but not about the parallel rawmidi operations. For addressing the race, this patch introduced a new spinlock that covers each rawmidi operation as well as the rawmidi handling in the complete callback. The URB is cleared with the lock, so it guarantees that the pending rawmidi task already finished or a NULL check is effective.

Announced Source revision 1
Original source ↗

CVE-2026-98316

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98316

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3c00004f134fc819f9d9e202c6a64acde0a1f8d0",
        "lessThan": "3b824930259d54f5047ce6b5c97bd20db2fc2b98",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6c07aad8a7c9ef8ebc4d03a964b882123a349a2e",
        "lessThan": "c83d6b0a65f7b71bbabcc91c045dfbffdff6ae76",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eb482a06791d6168beb8c78cc904ac5a5ed96a55",
        "lessThan": "0a7ecf52cb59ed77ec525deb52c496ea8fba10b1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7df3194bdb7479cad9199889655a566a2c0c1d1b",
        "lessThan": "812ca56867bec3065c2a27f1ff5ce04e2a8bf4f0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b06ebc7fe25a6af4a9f6e4a3d4236a4178ad4b01",
        "lessThan": "9c8b6eff6e7505c128b615d9a1364ef66fa5c18e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "459d3a64766f5ca2f1886daeaf24582831a5f5ab",
        "lessThan": "221253723dc58bb901c3f27a7659823e63fc598c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9af08677aa57debaca5b57c8045c52a83d3dd376",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a77febac6faf6da40fbb4555f703eeb91b58130",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.270",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.221",
        "lessThan": "5.16",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "sound/usb/bcd2000/bcd2000.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.1.188",
        "lessThan": "6.1.189",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.157",
        "lessThan": "6.6.158",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.12.109",
        "lessThan": "6.12.112",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.18.50",
        "lessThan": "6.18.54",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "7.2.4",
        "lessThan": "7.2.8",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "sound/usb/bcd2000/bcd2000.c"
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-98316

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38395 · Revision 1
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