CVE-2026-63930
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
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().
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/29783e6b6ec0b7152a15e53a063f17537e81177d ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/29783e6b6ec0b7152a15e53a063f17537e81177dPatch
- https://git.kernel.org/stable/c/2ff615fc455acda5425c4900160cbe11cfea4449Patch
- https://git.kernel.org/stable/c/6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4Patch
- https://git.kernel.org/stable/c/9319c94f63ed10723afd738d79f5617daba87cc8Patch
- https://git.kernel.org/stable/c/a3763ae33476328cf8d661742deb9daec78eac96Patch
- https://git.kernel.org/stable/c/b71893c57730809c222766e5718bb33610f11963Patch
- https://git.kernel.org/stable/c/d2759d49860b9a39b5cde2fb88e4b822ddf5f58fPatch
- https://git.kernel.org/stable/c/e965627f0d442bfcae3f496c90cb653fb0917a61Patch