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

highCVSS 7.1CVE-2026-80680

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Callback not properly unregistered on i2c amd-mp2 adapter initialization failure.
Who is affected: AMD-MP2 i2c adapter users on Linux systems experiencing adapter add failures.
Urgency: High priority; rated 7.1 CVSS and can leave stale callbacks that may cause memory corruption or crashes.
Action: Update to a patched Linux kernel version that unregisters callbacks on amd-mp2 adapter add failure.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80680

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-806800.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80680	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-80680: In the Linux kernel, the following vulnerability has been resolved: i2c: amd-mp2: Unregister c…nvd

Recent advisories for i2c

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-80680: In the Linux kernel, the following vulnerability has been resolved: i2c: amd-mp2: Unregister c…nvd · 2026-08-28
highCVE-2026-80678: In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Fix slave regist…nvd · 2026-08-28
unknownCVE-2026-74547: In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix busy-…nvd · 2026-08-15
unknownCVE-2026-74463: In the Linux kernel, the following vulnerability has been resolved: i2c: jz4780: Cache host cl…nvd · 2026-08-15
unknownCVE-2026-74462: In the Linux kernel, the following vulnerability has been resolved: i2c: imx: mark I2C adapter…nvd · 2026-08-15
highCVE-2026-74461: In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Cancel hrtimer b…nvd · 2026-08-15