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media: rtl2832_sdr: Return queued buffers on start_streaming() failure

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: media: rtl2832_sdr: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. rtl2832_sdr_start_streaming() had multiple error paths that hit this trap: two direct early returns (-ENODEV, -ERESTARTSYS), plus six `goto err` paths covering subdev s_power, tuner setup, ADC setup, stream-buffer allocation, urb allocation, and urb submission failures. None of them returned the queued buffers. The original function had no distinct success exit and fell straight through into the err label, which previously only did mutex_unlock and "return ret". Adding queued-buffer cleanup at err must therefore be paired with an explicit success return; otherwise every successful start would also drain the buffer queue and kill streaming. Add that success return, then add rtl2832_sdr_cleanup_queued_bufs() at the err label and before each early return. The cleanup helper takes a vb2_buffer_state argument so that the start_streaming error paths can pass VB2_BUF_STATE_QUEUED (as expected by userspace on start_streaming failure) while stop_streaming keeps its existing VB2_BUF_STATE_ERROR semantics. This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo

Announced Source revision 1
Original source ↗

CVE-2026-68213

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-2026-68213

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": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "fd1e11fc3849169285e48b2d4ec441614ad2ea74",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "772f2550fe32357557d3b2f88e02f7cf477f0789",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "a248273f8af6e630a03e823274385725974009b5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "465dc8e71d2db2ed603e749fa71392bcdccf07eb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "0b08c0403cf672a121ace4eff647a9b240bd4e1b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "894e83509c66910112b9eaeaa8cd66cd9806db91",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "fc0b18782aab4e35078efe72863df8eab46560a8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "771138920eafa399f68d3492c8a75dfeea23474b",
        "lessThan": "33ca0aab6f4bd90921fc1395478f38f72c4d19af",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/dvb-frontends/rtl2832_sdr.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/dvb-frontends/rtl2832_sdr.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68213

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41158 · Revision 1
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Publisher date
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