CVE-2026-2411 Vulnerability Analysis & Exploit Details

CVE-2026-2411
Vulnerability Scoring

6.5
/10
High Risk

If left unpatched, CVE-2026-2411 could lead to major system disruptions or data loss.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Adjacent_network
    Attack Vector Under Analysis
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-2411 Details

Status: Analyzed

Last updated: 🕛 01 Sep 2026, 00:16 UTC
Originally published on: 🕐 01 Aug 2026, 13:16 UTC

Time between publication and last update: 30 days

CVSS Release: version 3

CVSS3 Source

vulnerabilities@zephyrproject.org

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVE-2026-2411 Vulnerability Summary

CVE-2026-2411: Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declaration whose permission is hard-coded to BT_GATT_PERM_READ, and a Characteristic Value attribute that carries the application-specified security permissions (e.g. BT_GATT_PERM_READ_ENCRYPT / READ_AUTHEN / READ_LESC). The public notify and indicate APIs explicitly accept either attribute, and passing the declaration is the documented, common idiom. Before sending each notification or indication, the host re-checks link security with bt_gatt_check_perm() against params->attr in gatt_notify(), gatt_indicate(), and gatt_notify_multiple_verify_params() (subsys/bluetooth/host/gatt.c). When the application passed the Characteristic Declaration attribute, the host correctly redirected the value handle but left params->attr pointing at the declaration, so the security check evaluated the declaration's permissions (no security required) instead of the value's. As a result the encryption/authentication/LESC requirement configured on the characteristic value was skipped. The Notify-Multiple path additionally used a mask that omitted the LE Secure Connections requirement. A remote peer triggers the disclosure by connecting (optionally without pairing or encryption) and writing the Client Characteristic Configuration descriptor to enable notifications or indications, causing the server to emit the protected value over a link that has not reached the required security level. The impact is information disclosure / access-control bypass for characteristic values the application intended to expose only over a secured link; exposure depends on the application declaring encrypt/authen-required notify/indicate characteristics and on the CCC being writable at a lower security tier. There is no memory-safety or availability impact. The fix adds bt_gatt_attr_resolve_value(), which maps a declaration attribute to the following value attribute before the permission check, and switches the Notify-Multiple path to the full BT_GATT_PERM_READ_ENCRYPT_MASK so the LESC requirement is also enforced.

Assessing the Risk of CVE-2026-2411

Access Complexity Graph

The exploitability of CVE-2026-2411 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-2411

With low attack complexity and no required privileges, CVE-2026-2411 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-2411, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-2411, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-2411 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2026-2411 poses no threat to data integrity.
  • Availability: None
    CVE-2026-2411 does not impact system availability.

CVE-2026-2411 References

External References

CWE Common Weakness Enumeration

CWE-863

Vulnerable Configurations

  • cpe:2.3:o:zephyrproject:zephyr:2.6.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.6.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.6.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.6.1:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.6.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc4:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc4:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc5:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.7.0:rc5:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.8.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.79.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.79.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.81.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.81.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.82.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.82.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.83.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.83.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.84.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.84.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.85.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.85.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.86.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.86.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.87.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.87.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.88.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.88.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.89.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.89.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.90.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.90.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.91.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.91.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.92.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.92.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.93.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.93.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.94.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.94.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:2.95.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:2.95.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.0.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.0.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.1.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.1.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.1.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.1:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.1:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.01:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.01:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.31:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.31:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.40:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.40:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.2.41:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.2.41:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.3.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.3.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.3.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.4.0:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.4.0:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.5.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.5.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.6.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.6.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.6.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.1:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.1:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.1:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.2:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.2:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:3.7.2:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:3.7.2:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.0.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.0.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.0.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.1.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.1.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.1.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.2.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.2.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.2.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.2.1:*:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.2.1:*:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.3.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.3.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.3.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.3.1:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.3.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.0:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.0:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.1:-:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.1:-:*:*:*:*:*:*
  • cpe:2.3:o:zephyrproject:zephyr:4.4.1:rc1:*:*:*:*:*:*
    cpe:2.3:o:zephyrproject:zephyr:4.4.1:rc1:*:*:*:*:*:*

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