CVE-2026-64080
Description
A flaw was found in the Linux kernel's ARM Firmware Framework for Arm (FFA) component. This vulnerability occurs because the system's notification handlers do not properly manage memory when processing callbacks. A timing issue can allow a callback to be unregistered and freed while it is still being accessed, leading to a use-after-free condition. This can result in system instability or unexpected behavior.
Statement
This vulnerability is rated as Moderate impact for Red Hat because triggering the race condition requires local system access and precise timing during unregistration of notification callbacks, restricting the blast radius primarily to local denial of service. Furthermore, the flawed logic is specific to ARM architecture firmware communication and is not present in supported Red Hat Enterprise Linux releases.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | N/A | 9.3 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | High | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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