CVE-2026-68204
media: vivid: check for vb2_is_busy() when toggling caps
Description
In the Linux kernel, the following vulnerability has been resolved: media: vivid: check for vb2_is_busy() when toggling caps The vivid_update_format_cap/out() functions must only be called if the capture/output queue are not busy. But for the controls that select the CROP/COMPOSE/SCALE capability that is not checked. Only when streaming starts will they be set to 'grabbed' and it is impossible to change the control, but between REQBUFS and STREAMON you are still allowed to set these controls. Since vivid_update_format_cap/out will change the format, this can cause unexpected results. Besides adding these checks, also add a WARN_ON in vivid_update_format_cap/out() if the queue is busy. I'm 90% certain that this is the cause of this syzbot bug: https://syzkaller.appspot.com/bug?extid=dac8f5eaa46837e97b89 But since we never have reproducers, it is hard to be certain. In any case, these checks are needed regardless.
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
- Add checks for vb2_is_busy() in vivid_update_format_cap/out.
- Add WARN_ON if queue is busy in vivid_update_format_cap/out.
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-2026-68204.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68204 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-2026-68204
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-2026-68204 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68204 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': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'a9cd0e8fb0b21faaa71199d9d3feb305c18ff576', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'abaec6747304581f8d4a9936352fa10e13325f07', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': '492c97cb50feaa60ccd7792d3d6b904ed8ec61bf', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'daf2d92669b4a659d805d88d811161c70cd325ee', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'c2d1a2130c93f6d758af58590b86b2254c7a1dec', 'versionType': 'git'}], 'programFiles': ['drivers/media/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.18', '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/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'a9cd0e8fb0b21faaa71199d9d3feb305c18ff576', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'abaec6747304581f8d4a9936352fa10e13325f07', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': '492c97cb50feaa60ccd7792d3d6b904ed8ec61bf', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'daf2d92669b4a659d805d88d811161c70cd325ee', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'c2d1a2130c93f6d758af58590b86b2254c7a1dec', 'versionType': 'git'}], 'programFiles': ['drivers/media/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.18', '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/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.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': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'a9cd0e8fb0b21faaa71199d9d3feb305c18ff576', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'abaec6747304581f8d4a9936352fa10e13325f07', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': '492c97cb50feaa60ccd7792d3d6b904ed8ec61bf', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'daf2d92669b4a659d805d88d811161c70cd325ee', 'versionType': 'git'}, {'status': 'affected', 'version': '73c3f48230cda01402ae189b05d56f1f7e0d53c9', 'lessThan': 'c2d1a2130c93f6d758af58590b86b2254c7a1dec', 'versionType': 'git'}], 'programFiles': ['drivers/media/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.18', '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/test-drivers/vivid/vivid-ctrls.c', 'drivers/media/test-drivers/vivid/vivid-vid-cap.c', 'drivers/media/test-drivers/vivid/vivid-vid-out.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: media: vivid: check for vb2_is_busy() when toggling caps The vivid_update_format_cap/out() functions must only be called if the capture/output queue are not busy. But for the controls that select the CROP/COMPOSE/SCALE capability that is not checked. Only when streaming starts will they be set to 'grabbed' and it is impossible to change the control, but between REQBUFS and STREAMON you are still allowed to set these controls. Since vivid_update_format_cap/out will change the format, this can cause unexpected results. Besides adding these checks, also add a WARN_ON in vivid_update_format_cap/out() if the queue is busy. I'm 90% certain that this is the cause of this syzbot bug: https://syzkaller.appspot.com/bug?extid=dac8f5eaa46837e97b89 But since we never have reproducers, it is hard to be certain. In any case, these checks are needed regardless. Added Reference https://git.kernel.org/stable/c/492c97cb50feaa60ccd7792d3d6b904ed8ec61bf Added Reference https://git.kernel.org/stable/c/a9cd0e8fb0b21faaa71199d9d3feb305c18ff576 Added Reference https://git.kernel.org/stable/c/abaec6747304581f8d4a9936352fa10e13325f07 Added Reference https://git.kernel.org/stable/c/c2d1a2130c93f6d758af58590b86b2254c7a1dec Added Reference https://git.kernel.org/stable/c/daf2d92669b4a659d805d88d811161c70cd325ee