Skip to content
Heist/ feed
Unrated

ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free() When snd_usb_create_mixer() fails, snd_usb_mixer_free() frees mixer->id_elems but the controls already added to the card still reference the freed memory. Later when snd_card_register() runs, the OSS mixer layer calls their callbacks and hits a use-after-free read. Call trace: get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411 get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241 mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381 snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887 ... snd_card_register+0x4ed/0x6d0 sound/core/init.c:923 usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025 Fix by calling snd_ctl_remove() for all mixer controls before freeing id_elems. We save the next pointer first because snd_ctl_remove() frees the current element.

Announced Source revision 1
Original source ↗

CVE-2026-23089

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-2026-23089

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": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "51b1aa6fe7dc87356ba58df06afb9677c9b841ea",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "56fb6efd5d04caf6f14994d51ec85393b9a896c6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "7009daeefa945973a530b2f605fe445fc03747af",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "7bff0156d13f0ad9436e5178b979b063d59f572a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "e6f103a22b08daf5df2f4aa158081840e5910963",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "dc1a5dd80af1ee1f29d8375b12dd7625f6294dad",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
        "lessThan": "930e69757b74c3ae083b0c3c7419bfe7f0edc7b2",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "sound/usb/mixer.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.249",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.199",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.162",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.122",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.68",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.8",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "sound/usb/mixer.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23089

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#39747 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement