What’s Vulnerable › Vulnerabilities

CVE-2026-80680: i2c: amd-mp2: Unregister callback on adapter add failure

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-08-29

Description

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.

Affected products

• Linux kernel: 5.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1883a09a37fed497b9efacf736c23624a472246b
• https://git.kernel.org/stable/c/2f7789b3a9628819ebf90bcba8f9da3c139f8687
• https://git.kernel.org/stable/c/4786d4d70dcd1e6b7e044f2348e00f201947b69c
• https://git.kernel.org/stable/c/82048795242f04275a3f49ffc66ad851b6120954
• https://git.kernel.org/stable/c/8bf719659406e4a1b56d441e0c7da2085d891d96
• https://git.kernel.org/stable/c/9142a3dcff0d80a3a24ce159aee19ddc869d9784
• https://git.kernel.org/stable/c/b7c2c5c8868737926410b93d1223ada17625ead3
• https://git.kernel.org/stable/c/cf107c5983dc70fcf932a305581a5f976d908ff1

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