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Linux CVE-2026-64520

| EUVDEUVD-2026-48864 HIGH
2026-07-25 Linux GHSA-p6rc-3j29-m628
Information Disclosure Linux Red Hat Suse
8.4
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative
Red Hat
7.0 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

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

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 06:04 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
8.4 (HIGH)
Patch available
Jul 25, 2026 - 11:18 EUVD
CVE Published
Jul 25, 2026 - 09:14 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 25, 2026 - 09:14 cve.org
HIGH 8.4

DescriptionCVE.org

In 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)

AnalysisAI

Local privilege escalation in the Linux kernel's ARM FFA firmware interface allows an unprivileged local attacker to achieve arbitrary code execution by triggering an out-of-bounds write when processing PARTITION_INFO_GET descriptors. The kernel fails to validate firmware-supplied indices, enabling a heap buffer overflow that can corrupt memory. Patches are available, no public exploit exists, and EPSS indicates low exploitation probability (0.21%).

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-64520 vulnerability details – vuln.today
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