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media: pwc: 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: pwc: 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. pwc's start_streaming() had two early returns that hit this trap: -ENODEV when the USB device was already disconnected, and -ERESTARTSYS when mutex_lock_interruptible() was interrupted by a signal. Call the existing pwc_cleanup_queued_bufs() helper with VB2_BUF_STATE_QUEUED before returning (matching the state already used by the pwc_isoc_init() error path in the same function). This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

Announced Source revision 1
Original source ↗

CVE-2026-68216

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-2026-68216

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": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "d552852bf76b7dfb35b4593fc874d8dd2f1b1bf3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "0362ae30b61b3053ee3095c1b8f179197ec4f539",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "fa78e590852751d3ad32f33f6b4e210fe6ccbe9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "f2f9fcacd81953dde6cb86312ab13ca13e689664",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "5d7cc2634c3843a1414a0f6407aa17f1f91dee60",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "cb16b79a2be2cec9c3ebe4147490817c4d8b1de3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "a4f8f629983f643333e49df90557805469bcbb25",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478",
        "lessThan": "975b2ee20e569d47821e4f6c9761b4664d48a6a4",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/media/usb/pwc/pwc-if.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.5",
        "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/usb/pwc/pwc-if.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68216

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41160 · Revision 1
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Publisher date
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