CVE-2026-85218
Description
A double stack-based buffer overflow was found in the BlueZ AVRCP controller implementation. A nearby BR/EDR peripheral can send a crafted AVRCP player-settings response that supplies an attacker-controlled attribute count, causing avrcp_list_player_attributes_rsp() and avrcp_get_current_player_value() in profiles/audio/avrcp.c to write attacker-controlled data past fixed-size stack buffers, potentially leading to a crash or code execution in the bluetoothd daemon.
Statement
Red Hat CVSSv3 score is an estimate from CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. This vulnerability requires user interaction and does not have any impact on the subsequent system, thus the scope is unchanged.
Mitigation
Affected version is v5.87 and fixed in commit b21c216d580cf303681bfe9eab60a5414d8b6cc0.
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 v4 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.3 | N/A | N/A |
| Attack Vector | Adjacent | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Attack Requirements | None | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Active | N/A | N/A |
| Vulnerable System Confidentiality | High | N/A | N/A |
| Vulnerable System Integrity | High | N/A | N/A |
| Vulnerable System Availability | High | N/A | N/A |
| Subsequent System Confidentiality | None | N/A | N/A |
| Subsequent System Integrity | None | N/A | N/A |
| Subsequent System Availability | None | N/A | N/A |
Vector
Red Hat: CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Red Hat CVSS v4 Score Explanation
Score from upstream GitHub Security Advisory GHSA-m2vx-pw5f-rc8v (NN-2026-0145)
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.1 | N/A | N/A |
| Attack Vector | Adjacent Network | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Required | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | High | N/A | N/A |
| Integrity Impact | High | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the program into an infinite loop.
Integrity,Confidentiality,Availability,Access Control
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands; Bypass Protection Mechanism
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of a program's implicit security policy.
Integrity,Confidentiality,Availability,Access Control,Other
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands; Bypass Protection Mechanism; Other
When the consequence is arbitrary code execution, this can often be used to subvert any other security service.
Acknowledgements
Upstream acknowledges Alexandro Calò (Nozomi Networks Labs) as the original reporter.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
