ACPI: processor: validate MADT IOAPIC entry bounds

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92522
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:55 UTC
Updated2026-09-18 18:18:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ACPI: processor: validate MADT IOAPIC entry bounds The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper. Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001390000 probability, percentile 0.036250000 (date 2026-09-21)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.3HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 5601bd81bc290a724ed47797d22c16cba4d7ed9f git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 ff82e3374e9103d046b2a82f4315d9a422ff097d git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 2a5520065e76000f8c979d3d7b3d861ccaaecf1e git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 8e67b58c04990817ac2dbf8ae03353be6a358cd4 git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 74d84320f8e37955eb286a7777843d554e6e75b2 git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 4d8ecaa332c163f2b44aa5027bf061950b71b5f3 git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 355bee5f11acb116cd256588631b4028ca562646 git Not specified
CNA Linux Linux affected ecf5636dcd59cd5508641f995cc4c2bafedbb995 2c50ffdc73f3a70d745d249f509fc290754121e6 git Not specified
CNA Linux Linux affected 4.0 Not specified
CNA Linux Linux unaffected 4.0 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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