dibs: loopback: validate offset and size in move_data()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72018
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:00 UTC
Updated2026-08-17 06:17:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: dibs: loopback: validate offset and size in move_data() The loopback move_data() performs a memcpy into the registered DMB without checking whether offset + size exceeds the DMB length. Unlike real ISM hardware, which enforces memory region bounds natively, the software loopback has no such protection. A peer-supplied out-of-bounds offset or oversized write would result in an OOB write past the allocated kernel buffer. Add an explicit bounds check before the memcpy to reject such requests with -EINVAL.

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: 0.001630000 probability, percentile 0.060140000 (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 f7a22071dbf316c982fb44308874bd7ad9ac2091 ee188a6b264b71315a67f1b9470faad308b730d2 git Not specified
CNA Linux Linux affected f7a22071dbf316c982fb44308874bd7ad9ac2091 b2f426a9a22886071966432ede8fceafffe12b8c git Not specified
CNA Linux Linux affected f7a22071dbf316c982fb44308874bd7ad9ac2091 94fe0ab01b480b52bd8f977edbd845ef375d69fd git Not specified
CNA Linux Linux affected f7a22071dbf316c982fb44308874bd7ad9ac2091 78237e3c0720fcc6eb9b87e90fd70f63eeca886f git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 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/b2f426a9a22886071966432ede8fceafffe12b8c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/78237e3c0720fcc6eb9b87e90fd70f63eeca886f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/94fe0ab01b480b52bd8f977edbd845ef375d69fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ee188a6b264b71315a67f1b9470faad308b730d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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