CVE-2026-28528

Stack crash via unchecked AVRCP attributes

Published Mar 30, 2026 · Updated Mar 30, 2026

Out-of-bounds read in BTstack before 1.8.1 allows physically proximate attackers to crash the stack via a crafted browsing request. The AVRCP Browsing Target GET_FOLDER_ITEMS handler trusts attribute count data, reads four-byte attr_id values beyond packet boundaries, and uses unchecked identifiers to update a 32-bit attribute bitmap. Reachability requires a paired Bluetooth Classic connection and an enabled browsing target; exploitation interrupts the hosting firmware or application and corrupts the handler's bitmap state.

CVSS severity2.1
Low
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in BTstack before 1.8.1 allows physically proximate attackers to crash the stack via a crafted browsing request. The AVRCP Browsing Target GET_FOLDER_ITEMS handler trusts attribute count data, reads four-byte attr_id values beyond packet boundaries, and uses unchecked identifiers to update a 32-bit attribute bitmap. Reachability requires a paired Bluetooth Classic connection and an enabled browsing target; exploitation interrupts the hosting firmware or application and corrupts the handler's bitmap state.

The record

CVE
CVE-2026-28528
Published
Mar 30, 2026
Updated
Mar 30, 2026
Vendor
BlueKitchen GmbH
Product
BTstack
Classifications
CWE-758, CWE-125, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.8.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

BlueKitchen GmbH · BTstackversion=0 <1.8.1

Published CVSS scores

2.1VulnCheckCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
4.6VulnCheckCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-758Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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