Linux Kernel up to 6.12.100/6.18.41/7.1.5/7.2-rc4 mctp i3c mctp_i3c_mod_init allocation of resources

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00-

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.100/6.18.41/7.1.5/7.2-rc4. This affects the function mctp_i3c_mod_init of the component mctp i3c. This manipulation causes allocation of resources. This vulnerability appears as CVE-2026-68314. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.12.100/6.18.41/7.1.5/7.2-rc4. Affected by this vulnerability is the function mctp_i3c_mod_init of the component mctp i3c. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net: mctp i3c: clean up notifier and buses if driver register fails mctp_i3c_mod_init() registers the I3C bus notifier and then walks the existing buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL) before registering the I3C device driver. If i3c_driver_register() fails, the function returns the error directly, leaving the notifier registered and every mctp_i3c_bus object created for the existing buses allocated. The notifier is left pointing into the module that failed to load and the bus list is leaked. Mirror the module exit path on this failure: unregister the notifier and tear down the buses that were added before returning the error. This issue was identified during our ongoing static-analysis research while reviewing kernel code.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-68314 since 07/30/2026. The exploitation appears to be easy. The attack can be launched remotely. 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 08/10/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch 49d15cfab247c0f60ce1800bdcd66850beea7b3a/a8bd8c109da5a87f0c5db0c23cf550d039fde77c/a40e83a34eaa2be64372286040696f04eabcd09f/03d1057305ef17ac3f5936ac1580bc9a1a826e14 is able to eliminate this problem.

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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: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
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 6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: 49d15cfab247c0f60ce1800bdcd66850beea7b3a/a8bd8c109da5a87f0c5db0c23cf550d039fde77c/a40e83a34eaa2be64372286040696f04eabcd09f/03d1057305ef17ac3f5936ac1580bc9a1a826e14

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-2026-68314 (🔒)
GCVE (CVE): GCVE-0-2026-68314
GCVE (VulDB): GCVE-100-387703

Entryinfo

Created: 08/10/2026 17:50
Changes: 08/10/2026 17:50 (59)
Complete: 🔍
Cache ID: 216::103

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