CVE-2021-3455

Disconnecting L2CAP channel right after invalid ATT request leads freeze

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Published Oct 19, 2021 CVSS 3.1 · 4.3 Medium EPSS 1.1% KEV · Not listed

Description

Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

zephyrproject-rtos

zephyr

affected

Version	Status	Constraints
`2.4.0`	affected	< unspecified
`2.5.0`	affected	< unspecified

Configuration 1 [-]

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-26778	Disconnecting L2CAP channel right after invalid ATT request leads freeze. Zephyr versions >= 2.4.0, >= 2.5.0 contain Use After Free (CWE-416). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 1.1% (1.106% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-7g38-3x9v-v7vp

History

No history.

Subscriptions

Zephyrproject Zephyr

Weaknesses

CWE-416

Sources

CVE record Updated: Sep 16, 2024, 6:38 PM

Status: PUBLISHED
Assigner: zephyr
Published: Oct 19, 2021, 10:25 PM
Updated: Sep 16, 2024, 6:38 PM
Reserved: Mar 19, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:05 AM

Status: Modified
Published: Oct 19, 2021, 11:15 PM
Modified: Jun 17, 2026, 4:05 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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