In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter deregistration race Adapters can be looked up by their id… (CVE-2026-64279)
A race condition vulnerability in the Linux kernel's i2c core was resolved by fixing the adapter deregistration process. The issue involved adapters being looked up by their ID while their resources could be freed concurrently, leading to potential use-after-free conditions. The fix ensures the adapter is removed from the IDR before teardown to prevent access to freed resources.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-64279) in the Linux kernel i2c core arises from a race condition during adapter deregistration. The function i2c_get_adapter() can look up adapters by their ID and take a reference to the embedded struct device. However, if the adapter is deregistered or registration fails, its resources could be accessed after being freed, such as the device name. The patch removes the adapter from the IDR before teardown to prevent such use-after-free access.
Potential Impact
Successful exploitation could lead to use-after-free conditions, potentially resulting in system crashes, data corruption, or privilege escalation due to improper handling of freed adapter resources. The CVSS score of 7.8 (high) reflects the potential for significant confidentiality, integrity, and availability impact.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel by removing the adapter from the IDR before teardown during deregistration and registration failure. Users should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or Linux kernel advisory for the current remediation status and apply updates accordingly.
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter deregistration race Adapters can be looked up by their id… (CVE-2026-64279)
Description
A race condition vulnerability in the Linux kernel's i2c core was resolved by fixing the adapter deregistration process. The issue involved adapters being looked up by their ID while their resources could be freed concurrently, leading to potential use-after-free conditions. The fix ensures the adapter is removed from the IDR before teardown to prevent access to freed resources.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-64279) in the Linux kernel i2c core arises from a race condition during adapter deregistration. The function i2c_get_adapter() can look up adapters by their ID and take a reference to the embedded struct device. However, if the adapter is deregistered or registration fails, its resources could be accessed after being freed, such as the device name. The patch removes the adapter from the IDR before teardown to prevent such use-after-free access.
Potential Impact
Successful exploitation could lead to use-after-free conditions, potentially resulting in system crashes, data corruption, or privilege escalation due to improper handling of freed adapter resources. The CVSS score of 7.8 (high) reflects the potential for significant confidentiality, integrity, and availability impact.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel by removing the adapter from the IDR before teardown during deregistration and registration failure. Users should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or Linux kernel advisory for the current remediation status and apply updates accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-q5pg-jgvg-gf28
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64279"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a65420e9c2644c7f8086311
Added to database: 07/25/2026, 23:09:02 UTC
Last enriched: 09/08/2026, 14:34:38 UTC
Last updated: 09/08/2026, 14:34:38 UTC
Views: 61
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