Linux Kernel up to 7.1.7 AMD MP2 I2C Driver amd_mp2_register_cb null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00-

Summaryinfo

A vulnerability described as very critical has been identified in Linux Kernel up to 7.1.7. Impacted is the function amd_mp2_register_cb of the component AMD MP2 I2C Driver. Such manipulation leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2026-80680. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 7.1.7. Affected by this issue is the function amd_mp2_register_cb of the component AMD MP2 I2C Driver. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: i2c: amd-mp2: Unregister callback on adapter add failure amd_mp2_register_cb() stores the platform I2C context in the MP2 PCI driver's callback table before the adapter is registered. If i2c_add_adapter() fails, probe returns and devres frees the context, but the PCI driver can still dereference the stale pointer from its IRQ and system-sleep callbacks. Unregister the callback before returning the adapter registration error.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-80680 since 08/26/2026. The exploitation is known to be easy. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/28/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44 or 7.1.8 eliminates this vulnerability. Applying the patch 9142a3dcff0d80a3a24ce159aee19ddc869d9784/2f7789b3a9628819ebf90bcba8f9da3c139f8687/4786d4d70dcd1e6b7e044f2348e00f201947b69c/b7c2c5c8868737926410b93d1223ada17625ead3/cf107c5983dc70fcf932a305581a5f976d908ff1/1883a09a37fed497b9efacf736c23624a472246b/8bf719659406e4a1b56d441e0c7da2085d891d96/82048795242f04275a3f49ffc66ad851b6120954 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: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
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: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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 5.10.265/5.15.216/6.1.183/6.6.151/6.12.103/6.18.44/7.1.8
Patch: 9142a3dcff0d80a3a24ce159aee19ddc869d9784/2f7789b3a9628819ebf90bcba8f9da3c139f8687/4786d4d70dcd1e6b7e044f2348e00f201947b69c/b7c2c5c8868737926410b93d1223ada17625ead3/cf107c5983dc70fcf932a305581a5f976d908ff1/1883a09a37fed497b9efacf736c23624a472246b/8bf719659406e4a1b56d441e0c7da2085d891d96/82048795242f04275a3f49ffc66ad851b6120954

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/28/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80680 (🔒)
GCVE (CVE): GCVE-0-2026-80680
GCVE (VulDB): GCVE-100-396632

Entryinfo

Created: 08/28/2026 10:57
Changes: 08/28/2026 10:57 (59)
Complete: 🔍
Cache ID: 216::103

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