iio: buffer: hw-consumer: fix use-after-free in error path

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63930
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:11 UTC
Updated2026-07-20 15:16:57 UTC
DescriptionIn 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().

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.002100000 probability, percentile 0.113650000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c b71893c57730809c222766e5718bb33610f11963 git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c 2ff615fc455acda5425c4900160cbe11cfea4449 git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c d2759d49860b9a39b5cde2fb88e4b822ddf5f58f git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c 29783e6b6ec0b7152a15e53a063f17537e81177d git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c e965627f0d442bfcae3f496c90cb653fb0917a61 git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c a3763ae33476328cf8d661742deb9daec78eac96 git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c 9319c94f63ed10723afd738d79f5617daba87cc8 git Not specified
CNA Linux Linux affected 48b66f8f936f369bb1a43c12aedbfeb2975baf4c 6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4 git Not specified
CNA Linux Linux affected 4.16 Not specified
CNA Linux Linux unaffected 4.16 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/29783e6b6ec0b7152a15e53a063f17537e81177d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b71893c57730809c222766e5718bb33610f11963 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d2759d49860b9a39b5cde2fb88e4b822ddf5f58f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e965627f0d442bfcae3f496c90cb653fb0917a61 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2ff615fc455acda5425c4900160cbe11cfea4449 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a3763ae33476328cf8d661742deb9daec78eac96 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9319c94f63ed10723afd738d79f5617daba87cc8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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