CVE-2026-68222
media: msi2500: Return queued buffers on start_streaming() failure
Description
In the Linux kernel, the following vulnerability has been resolved: media: msi2500: 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. msi2500_start_streaming() had five error paths that all hit this trap and were further tangled by ret-overwriting between calls: - -ENODEV when the USB device was already disconnected - -ERESTARTSYS when mutex_lock_interruptible() was interrupted - msi2500_set_usb_adc() failure: ret was silently overwritten by the next call (msi2500_isoc_init), so the error was lost entirely - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but the function then fell through to msi2500_ctrl_msg() and again masked the original error by overwriting ret - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all, leaving isoc URBs submitted with no way for the driver to consume them Consolidate the error paths into a small goto chain. Every failure now stops the function, drains the queued-buffer list, and returns the real error code. The ctrl_msg failure path also rolls back the preceding msi2500_isoc_init() via msi2500_isoc_cleanup() before unlocking and draining. 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: 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 kernel patches that fix buffer handling on streaming start.
- Update systems to the patched kernel version.
- Test streaming functionality after applying updates.
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-2026-68222.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68222 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-2026-68222
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-2026-68222 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68222 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': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': 'bab9d5a67d4db96ae8c187b92b37979911302a10', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '264b5380c4f8aa92dbc2983ecd2b627f1d5e0061', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '3673cb0a5711e910074d69201da9e1535c03f97a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '7201c17786a498497bca57752883b90914d405ac', 'versionType': 'git'}], 'programFiles': ['drivers/media/usb/msi2500/msi2500.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.12', '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/msi2500/msi2500.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': 'bab9d5a67d4db96ae8c187b92b37979911302a10', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '264b5380c4f8aa92dbc2983ecd2b627f1d5e0061', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '3673cb0a5711e910074d69201da9e1535c03f97a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '7201c17786a498497bca57752883b90914d405ac', 'versionType': 'git'}], 'programFiles': ['drivers/media/usb/msi2500/msi2500.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.12', '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/msi2500/msi2500.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': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': 'bab9d5a67d4db96ae8c187b92b37979911302a10', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '264b5380c4f8aa92dbc2983ecd2b627f1d5e0061', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '3673cb0a5711e910074d69201da9e1535c03f97a', 'versionType': 'git'}, {'status': 'affected', 'version': '977e444f59ad16eedf66acae4f357011c74da291', 'lessThan': '7201c17786a498497bca57752883b90914d405ac', 'versionType': 'git'}], 'programFiles': ['drivers/media/usb/msi2500/msi2500.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.12', '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/msi2500/msi2500.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: media: msi2500: 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. msi2500_start_streaming() had five error paths that all hit this trap and were further tangled by ret-overwriting between calls: - -ENODEV when the USB device was already disconnected - -ERESTARTSYS when mutex_lock_interruptible() was interrupted - msi2500_set_usb_adc() failure: ret was silently overwritten by the next call (msi2500_isoc_init), so the error was lost entirely - msi2500_isoc_init() failure: cleanup_queued_bufs was called, but the function then fell through to msi2500_ctrl_msg() and again masked the original error by overwriting ret - msi2500_ctrl_msg(CMD_START_STREAMING) failure: no cleanup at all, leaving isoc URBs submitted with no way for the driver to consume them Consolidate the error paths into a small goto chain. Every failure now stops the function, drains the queued-buffer list, and returns the real error code. The ctrl_msg failure path also rolls back the preceding msi2500_isoc_init() via msi2500_isoc_cleanup() before unlocking and draining. 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: Return queued buffers on start_streaming() failure"). Added Reference https://git.kernel.org/stable/c/1d58229b330b7f67fbfa07e0f2a8a51fbeafaa9a Added Reference https://git.kernel.org/stable/c/264b5380c4f8aa92dbc2983ecd2b627f1d5e0061 Added Reference https://git.kernel.org/stable/c/3673cb0a5711e910074d69201da9e1535c03f97a Added Reference https://git.kernel.org/stable/c/7201c17786a498497bca57752883b90914d405ac Added Reference https://git.kernel.org/stable/c/bab9d5a67d4db96ae8c187b92b37979911302a10