CVE-2026-68216
media: pwc: Return queued buffers on start_streaming() failure
Description
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").
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the provided patch to the Linux kernel.
- Ensure buffers are returned on start_streaming() errors.
- Test for proper buffer handling in media drivers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68216.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68216 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68216
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68216 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68216 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '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-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/media/usb/pwc/pwc-if.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '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'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'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': '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-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/media/usb/pwc/pwc-if.c'], 'defaultStatus': 'affected'}] Added Description 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"). Added Reference https://git.kernel.org/stable/c/5d7cc2634c3843a1414a0f6407aa17f1f91dee60 Added Reference https://git.kernel.org/stable/c/975b2ee20e569d47821e4f6c9761b4664d48a6a4 Added Reference https://git.kernel.org/stable/c/a4f8f629983f643333e49df90557805469bcbb25 Added Reference https://git.kernel.org/stable/c/cb16b79a2be2cec9c3ebe4147490817c4d8b1de3 Added Reference https://git.kernel.org/stable/c/f2f9fcacd81953dde6cb86312ab13ca13e689664