CVE-2026-63930 Details
Description
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: hw-consumer: fix use-after-free in error path In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code was using list_for_each_entry() to iterate through buffers while calling iio_buffer_put() which can free the current buffer if refcount drops to 0. The list_for_each_entry() loop macro then evaluates buf->head.next to continue iteration, accessing the freed buffer. Fix this by using list_for_each_entry_safe().
A use-after-free vulnerability has been identified in the Linux kernel's IIO (Industrial Input/Output) buffer hardware consumer management. This issue arises in the 'iio_hw_consumer_alloc()' function, where the code improperly manages buffer references. During the error handling process, the function iterates through buffers using 'list_for_each_entry()'. While doing so, it calls 'iio_buffer_put()', which can free the current buffer if its reference count drops to zero. The iteration then attempts to access the next buffer in the list, leading to the potential use of a freed memory area. The vulnerability affects the Linux kernel stable group.
The vulnerability has been fixed in the Linux kernel. Users should upgrade to the latest version where this issue has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
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Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
No affected product data is available for this CVE.
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |