CVE-2026-72396 Linux CVE debrief

Who should care

System administrators and users of Linux systems with the hwmon adm1275 driver should be aware of this vulnerability and take steps to apply the fix. The vulnerability affects Linux systems using the hwmon adm1275 driver, and system administrators should review and apply the patch to ensure the security of their systems. This includes reviewing system logs for any unusual activity related to the hwmon adm1275 driver and ensuring all systems using the affected driver are updated. Additionally, security teams should verify that the patch has been applied and monitor for any potential security incidents related to this vulnerability. Operators and platform administrators should also be aware of the vulnerability and take steps to mitigate its impact. Vulnerability management teams should prioritize patching affected systems and monitor for potential security incidents. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified. Asset inventory and change management processes should be updated to reflect the patching of affected systems. Rollback and change window procedures should be reviewed to ensure that patches can be applied quickly and efficiently. Source tracking and monitoring should be implemented to detect potential security incidents related to this vulnerability. Monitoring and detection systems should be reviewed to ensure that they can detect potential security incidents related to this vulnerability. Logs and monitoring data should be reviewed regularly to detect any unusual activity related to the hwmon adm1275 driver. Asset inventory and change management processes should be updated to reflect the patching of affected systems. Compensating controls, such as additional monitoring or security measures, should be implemented for exposed systems while remediation is scheduled and verified. The patch should be applied as soon as possible to prevent potential security incidents. The vulnerability is considered to be of moderate severity, and patching affected systems is recommended as soon as possible. The Linux kernel patch has been developed and tested to fix the vulnerability, and it is now

Technical summary

The Linux kernel's hwmon adm1275 driver had a vulnerability where uninitialized stack memory could be read. This was due to the i2c_smbus_read_block_data function reading into an uninitialized stack array without a null terminator, allowing strncasecmp to read past valid bytes. The issue has been fixed by zeroing the stack array. The vulnerability affects Linux systems using the hwmon adm1275 driver and has been resolved by applying the patch. System administrators should review and apply the patch to ensure the security of their systems.

Defensive priority

This vulnerability involves a fix to the Linux kernel's hwmon adm1275 driver to prevent reading uninitialized stack memory. System administrators should review and apply the patch to ensure the security of their systems.

Recommended defensive actions

• Review and apply the provided patch to the Linux kernel's hwmon adm1275 driver
• Ensure all systems using the affected driver are updated
• Monitor system logs for any unusual activity related to the hwmon adm1275 driver
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE details a vulnerability in the Linux kernel's hwmon adm1275 driver. The issue arises from the i2c_smbus_read_block_data function reading up to 32 bytes into an uninitialized stack array without appending a null terminator. This can lead to strncasecmp reading past the valid bytes returned, potentially exposing uninitialized stack memory. A fix has been applied to zero the stack array to prevent this issue.

Official resources