Linux Kernel up to 6.12.108/6.18.49/7.2.3 HID roccat_report_event cbuf allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.41+

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.12.108/6.18.49/7.2.3. Affected by this issue is the function roccat_report_event of the component HID. Performing a manipulation of the argument cbuf results in allocation of resources. This vulnerability is known as CVE-2026-89627. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.12.108/6.18.49/7.2.3. This affects the function roccat_report_event of the component HID. The manipulation of the argument cbuf with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: HID: roccat: free buffered reports when destroying device roccat_report_event() duplicates each report with kmemdup() and stores the allocation in a circular-buffer slot. The allocation is released only when that slot is reused. The device destruction paths free struct roccat_device without releasing reports still stored in cbuf[]. This makes those allocations unreachable and leaks up to ROCCAT_CBUF_SIZE report buffers per device. Add a small destructor that frees every buffered report before freeing the device, and use it in both paths that can destroy a registered device.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-89627 since 09/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/12/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 6.12.109, 6.18.50, 7.2.4 or 7.3-rc1 eliminates this vulnerability. Applying the patch 943b8dc2c6044c01e36395f51bb809a4b6bdfd22/da00eac19feef209c9591e48c860afc2014603be/fbb5a60f5c31b5625f0d89a79912fbcb2559289b/bbff0ccbff360a5498075525005f6a913239a3d7 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
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 6.12.109/6.18.50/7.2.4/7.3-rc1
Patch: 943b8dc2c6044c01e36395f51bb809a4b6bdfd22/da00eac19feef209c9591e48c860afc2014603be/fbb5a60f5c31b5625f0d89a79912fbcb2559289b/bbff0ccbff360a5498075525005f6a913239a3d7

Timelineinfo

09/11/2026 CVE reserved
09/12/2026 +1 days Advisory disclosed
09/12/2026 +0 days VulDB entry created
09/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89627 (🔒)
GCVE (CVE): GCVE-0-2026-89627
GCVE (VulDB): GCVE-100-402975

Entryinfo

Created: 09/12/2026 02:20
Changes: 09/12/2026 02:20 (60)
Complete: 🔍
Cache ID: 216::103

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