ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72262
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:54 UTC
Updated2026-08-23 13:16:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get The ipc_control_data buffer is allocated as kzalloc(max_size), where max_size covers the entire struct sof_ipc_ctrl_data including its flexible array payload. However, the bounds checks in bytes_ext_put and _bytes_ext_get compared user data lengths against max_size directly, ignoring that cdata->data sits at an offset of sizeof(struct sof_ipc_ctrl_data) bytes into the allocation. This allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past the end of the heap buffer from unprivileged userspace via the ALSA TLV kcontrol interface, and similarly allowed over-reading adjacent heap data on the get path. Fix all bounds checks to subtract sizeof(*cdata) from max_size so they reflect the actual space available at the cdata->data offset. Also fix the error-path restore in bytes_ext_put which wrote to cdata->data instead of cdata, causing the same overflow.

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: 0.001770000 probability, percentile 0.075050000 (date 2026-08-17)

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 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 af4b437a463ac0482ba705434a44da06783778e6 git Not specified
CNA Linux Linux affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 1adde1941bba7b0d7104b86ed819d48d81cb0ad9 git Not specified
CNA Linux Linux affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 eaa67e139c9217099e2a7b717aeeb46c65de3494 git Not specified
CNA Linux Linux affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 121577383b5cf221e86581e0f2bcca4c66f17469 git Not specified
CNA Linux Linux affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 f4933e1d11b97b6a0951648b7c3e53850e1b33a9 git Not specified
CNA Linux Linux affected 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 fd46668d538993218eea19c6925c868ac0f2630c git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.1.184 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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