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Linux EUVDEUVD-2026-48864

| CVE-2026-64520 HIGH
2026-07-25 Linux GHSA-p6rc-3j29-m628
Information Disclosure Linux
8.4
CVSS 3.1 · Vendor: Linux
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This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

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%).

Affected VersionsENISA

Linux patch: 7.1
Linux patch: 7.0.11
Linux 6.12
Linux ba85c644ac8dc37d9b01a3332c2f142cb4d46954 <f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95
Linux patch: 6.18.34
Linux ba85c644ac8dc37d9b01a3332c2f142cb4d46954 <3974ea1938406f9bfa7c1f48d4e43533f447bb08
Linux ba85c644ac8dc37d9b01a3332c2f142cb4d46954 <79d95c02ae0a95e6e80e8e92b7ca74ecee02854f
Linux patch: 0

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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  • Exploit and PoC references, threat intelligence from 22 sources
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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
Red Hat 7.0 MEDIUM

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

4
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)

Threat Intelligence Overview

EPSS Score
0.2%
Top 89% exploitable
Social Media
1
Sightings
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vendor CIRCL VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
9.8
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9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

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

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-64520 ADVISORY https://ubuntu.com/security/notices/USN-8618-1 ADVISORY https://vuldb.com/vuln/383314 REF https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08 REF https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f REF https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95

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