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media: em28xx: fix use-after-free in em28xx_v4l2_open()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: media: em28xx: fix use-after-free in em28xx_v4l2_open() em28xx_v4l2_open() reads dev->v4l2 without holding dev->lock, creating a race with em28xx_v4l2_init()'s error path and em28xx_v4l2_fini(), both of which free the em28xx_v4l2 struct and set dev->v4l2 to NULL under dev->lock. This race leads to two issues: - use-after-free in v4l2_fh_init() when accessing vdev->ctrl_handler, since the video_device is embedded in the freed em28xx_v4l2 struct. - NULL pointer dereference in em28xx_resolution_set() when accessing v4l2->norm, since dev->v4l2 has been set to NULL. Fix this by moving the mutex_lock() before the dev->v4l2 read and adding a NULL check for dev->v4l2 under the lock.

Announced Group revision 1
Original source ↗

CVE-2026-31583

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-2026-31583

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": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "3c0283a59e36e3707c4a81f4952e362d31f876b8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "2cbf81f76842e46bdf25823c70e1db4044a65678",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "38a327221f7f765e7d853b7bafe47e342441ec85",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "b5d141ea15f173f15b9f0a72965902f3428c0d92",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "5fb2940327722b4684d2f964b54c1c90aa277324",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "871b8ea8ef39a6c253594649f4339378fad3d0dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "6b9e66437cc6123ddedac141e1b8b6fcf57d2972",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "dd2b888e08d3b3d6aacd65d76cd44fac11da750f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8139a4d583abad45eb987b5a99b3281b6d435b7e",
        "lessThan": "a66485a934c7187ae8e36517d40615fa2e961cff",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/usb/em28xx/em28xx-video.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.16"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.16",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.136",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.83",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.24",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.14",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.1",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/usb/em28xx/em28xx-video.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31583

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28296 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-31583 · Revision 1Source updated