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media: em28xx: defer audio-only extension registration

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: defer audio-only extension registration The audio-only path registers extensions while probing the primary device. For a dual-TS board, this happens before dev_next is created. The duplicate device inherits is_audio_only and is then independently inserted into em28xx_devlist. The list is intended to contain only primary devices: extension operations reach the secondary device through dev_next. The independently linked secondary can be freed during disconnect while its list node remains reachable, resulting in a use-after-free. Defer audio-only extension registration to the module-request work item. It runs only after probing has completed construction of the optional secondary device, so only the primary is registered and extension callbacks reach the secondary through dev_next.

Announced Source revision 1
Original source ↗

CVE-2026-89892

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-2026-89892

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": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "0da1e627f4fc9d0e947fdae90913042120878923",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "f8d7e77d9c621b42a191c67a9b37bec23dc1d555",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "1abe9524dec0fd26e9ceb8d586034d6f68dd8273",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "4e11c45dfdc72ab656067b1df8fcebaf52fd4715",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "d06067ee32620f272cfb80c7bc7c572ad4e74724",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "f9322ac9f862961d7f377b87ec26c8565af7e073",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "4666197ca4f7d80cd3b0292054fe45d76be9ba04",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4a089668ef22c295ed4997289cc48446c849249c",
        "lessThan": "95f76f51937fdfb0fc1e14cae606b1ef574a56f3",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/usb/em28xx/em28xx-cards.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.17"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.17",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/usb/em28xx/em28xx-cards.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89892

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36339 · Revision 1
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Publisher date
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