of: reserved_mem: prevent OOB when too many dynamic regions are defined

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80723
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:58 UTC
Updated2026-08-29 07:16:54 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: prevent OOB when too many dynamic regions are defined On boot, fdt_scan_reserved_mem() saves each dynamically-placed /reserved-memory subnode into a local array of size MAX_RESERVED_REGIONS. If the device tree defines more than MAX_RESERVED_REGIONS dynamically-placed regions, fdt_scan_reserved_mem() writes past the end of the local array. Add a bounds check that logs an error and skips the excess regions, restoring the original behavior.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001560000 probability, percentile 0.050910000 (date 2026-08-28)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.4HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 9a0fe62f93ede02c27aaca81112af1e59c8c0979 68d27250c9e81ab7764603e346c2b1017cb53adf git Not specified
CNA Linux Linux affected 8a6e02d0c00e7b62e6acb74146878bb91e9e7e31 cfa7e2734877330d6c10e0f33953905486c4530c git Not specified
CNA Linux Linux affected 8a6e02d0c00e7b62e6acb74146878bb91e9e7e31 de8ccbd6bf4efe7a059e2c483789936009e10f42 git Not specified
CNA Linux Linux affected 8a6e02d0c00e7b62e6acb74146878bb91e9e7e31 db3dbdfea1b8f38774419c5c2c14e4b81c48708d git Not specified
CNA Linux Linux affected 6.12.13 6.12.103 semver Not specified
CNA Linux Linux affected 6.13 Not specified
CNA Linux Linux unaffected 6.13 semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/de8ccbd6bf4efe7a059e2c483789936009e10f42 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/db3dbdfea1b8f38774419c5c2c14e4b81c48708d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cfa7e2734877330d6c10e0f33953905486c4530c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/68d27250c9e81ab7764603e346c2b1017cb53adf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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