firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64520
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:38 UTC
Updated2026-07-27 05:16:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies The register-based PARTITION_INFO_GET path trusted the firmware-provided indices when copying partition descriptors into the caller buffer. Reject inconsistent counts or index progressions so the copy loop cannot write past the allocated array. (fixed cur_idx when exactly one descriptor in the first fragment)

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: 0.001310000 probability, percentile 0.030610000 (date 2026-07-29)

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 ba85c644ac8dc37d9b01a3332c2f142cb4d46954 f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95 git Not specified
CNA Linux Linux affected ba85c644ac8dc37d9b01a3332c2f142cb4d46954 79d95c02ae0a95e6e80e8e92b7ca74ecee02854f git Not specified
CNA Linux Linux affected ba85c644ac8dc37d9b01a3332c2f142cb4d46954 3974ea1938406f9bfa7c1f48d4e43533f447bb08 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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