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CVE-2026-63930

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-63930 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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().. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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().

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.16%

5.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < b71893c57730809c222766e5718bb33610f11963; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < 2ff615fc455acda5425c4900160cbe11cfea4449; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < d2759d49860b9a39b5cde2fb88e4b822ddf5f58f; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < 29783e6b6ec0b7152a15e53a063f17537e81177d; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < e965627f0d442bfcae3f496c90cb653fb0917a61; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < a3763ae33476328cf8d661742deb9daec78eac96; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < 9319c94f63ed10723afd738d79f5617daba87cc8; >= 48b66f8f936f369bb1a43c12aedbfeb2975baf4c, < 6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4
LinuxLinux4.16

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63930?
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().
How severe is CVE-2026-63930?
CVE-2026-63930 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63930?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST