Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5 vivid vivid_update_format_cap/vivid_update_format_out input validation

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.54+

Summaryinfo

A vulnerability labeled as very critical has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5. The affected element is the function vivid_update_format_cap/vivid_update_format_out of the component vivid. The manipulation results in input validation. This vulnerability was named CVE-2026-68204. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5. Affected is the function vivid_update_format_cap/vivid_update_format_out of the component vivid. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-68204 since 07/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/10/2026).

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc1 eliminates this vulnerability. Applying the patch a9cd0e8fb0b21faaa71199d9d3feb305c18ff576/abaec6747304581f8d4a9936352fa10e13325f07/492c97cb50feaa60ccd7792d3d6b904ed8ec61bf/daf2d92669b4a659d805d88d811161c70cd325ee/c2d1a2130c93f6d758af58590b86b2254c7a1dec is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc1
Patch: a9cd0e8fb0b21faaa71199d9d3feb305c18ff576/abaec6747304581f8d4a9936352fa10e13325f07/492c97cb50feaa60ccd7792d3d6b904ed8ec61bf/daf2d92669b4a659d805d88d811161c70cd325ee/c2d1a2130c93f6d758af58590b86b2254c7a1dec

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68204 (🔒)
GCVE (CVE): GCVE-0-2026-68204
GCVE (VulDB): GCVE-100-387558

Entryinfo

Created: 08/10/2026 16:10
Changes: 08/10/2026 16:10 (59)
Complete: 🔍
Cache ID: 216::103

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