Bug 2528181

Summary:	CVE-2026-85218 bluez: bluez: AVRCP ListPlayerAttributes double stack overflow in avrcp_list_player_attributes_rsp/avrcp_get_current_player_value [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Melissa Ing <meing>
Component:	bluez	Assignee:	Peter Robinson <pbrobinson>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	bnocera, dwmw2, lihis, michel, ngompa13, pbrobinson
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["befd253d-f5d7-44a9-9da3-6dabb20b55a7"]}
Fixed In Version:	bluez-5.87+1.git8750129efca8-1.fc44 bluez-5.87+1.git8750129efca8-1.fc45 bluez-5.87+1.git8750129efca8-1.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-11 01:01:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Melissa Ing 2026-09-03 19:02:31 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A double stack-based buffer overflow was found in the BlueZ AVRCP controller implementation in profiles/audio/avrcp.c. When processing an AVRCP player settings response, avrcp_list_player_attributes_rsp() trusts an attacker-controlled attribute count from pdu->params[0] and writes past a 4-byte stack array (attrs[4]). The inflated count (up to 255) is then passed to avrcp_get_current_player_value(), which copies attacker-controlled data into a 12-byte stack buffer via memcpy, causing a second, larger overflow (up to ~243 bytes past the buffer).

A malicious nearby BR/EDR Bluetooth peripheral can exploit this by sending a crafted AVRCP player-settings response once a victim device reaches player-settings discovery, corrupting adjacent stack memory in the root-owned bluetoothd daemon and potentially achieving code execution.

Reported by Alexandro Calò of Nozomi Networks Labs (advisory NN-2026-0145).

Reference: https://github.com/bluez/bluez/security/advisories/GHSA-m2vx-pw5f-rc8v

Comment 1 Melissa Ing 2026-09-03 19:14:39 UTC

Patches are available at https://patchwork.kernel.org/project/bluetooth/list/?series=1155564 and will be included in a future upstream fix.

Comment 2 Fedora Update System 2026-09-09 13:04:54 UTC

FEDORA-2026-9e011ac6ed (bluez-5.87+1.git8750129efca8-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-9e011ac6ed

Comment 3 Fedora Update System 2026-09-09 13:05:52 UTC

FEDORA-2026-d4156b5fc5 (bluez-5.87+1.git8750129efca8-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d4156b5fc5

Comment 4 Fedora Update System 2026-09-09 13:06:43 UTC

FEDORA-2026-6ed52ea50e (bluez-5.87+1.git8750129efca8-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6ed52ea50e

Comment 5 Fedora Update System 2026-09-10 01:47:16 UTC

FEDORA-2026-d4156b5fc5 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-d4156b5fc5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d4156b5fc5

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-09-10 02:07:33 UTC

FEDORA-2026-6ed52ea50e has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6ed52ea50e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6ed52ea50e

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2026-09-10 02:17:37 UTC

FEDORA-2026-9e011ac6ed has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-9e011ac6ed`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-9e011ac6ed

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2026-09-11 01:01:58 UTC

FEDORA-2026-d4156b5fc5 (bluez-5.87+1.git8750129efca8-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-09-12 00:19:07 UTC

FEDORA-2026-9e011ac6ed (bluez-5.87+1.git8750129efca8-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-09-12 01:15:18 UTC

FEDORA-2026-6ed52ea50e (bluez-5.87+1.git8750129efca8-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.