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CVE-2026-42566— Meshtastic 输入验证错误漏洞

一分钟漏洞结论

影响对象
meshtastic firmware
利用判断
存在公开或 AI PoC，应优先验证
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Meshtastic Meshtastic是Meshtastic社区的一款LoRa无线通信设备。 Meshtastic 2.7.23.b246bcd之前版本存在输入验证错误漏洞，该漏洞源于输入验证错误，可能导致通过iOS App管理时，一个带有畸形字符编码的User.long_name广播节点使其他无线电设备无法使用，进而导致BLE同步进入失败/重试循环，并丧失对受影响设备的控制。

CVSS 7.5 · High EPSS 0.49% · P40

影响版本矩阵 1

厂商产品 版本范围状态
meshtastic firmware < 2.7.23.b246bcd affected
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一、 漏洞 CVE-2026-42566 基础信息

漏洞信息
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Vulnerability Title
Meshtastic: Malformed UTF-8 in User.long_name broadcast over LoRa causes mesh-wide client decode failure
来源: CVE Program / CVE List V5
Vulnerability Description
Meshtastic is an open source mesh networking solution. Prior to version 2.7.23.b246bcd, a single node advertising a User.long_name that contains a malformed character encoding can render other radios unusable over BLE when managed through the iOS app. The malformed name does not need to be maliciously crafted — it can arise from ordinary buffer truncation and has been observed occurring naturally in the wild. At least one code path could place a null terminator in the middle of a multibyte sequence, leaving a malformed User.long_name in the node database. The problem surfaced downstream: the iOS app enforced encoding validation and therefore cannot parse a node database once it contains a poisoned entry. This caused BLE sync to enter a fail/retry loop, resulting in loss of control over the affected device. For a typical user managing their radio with the iOS app, the device becomes effectively unusable until the poisoned node ages out of the on-device database, or unless they have an alternate management path (e.g., the Python CLI, which can be used to identify and remove the offending entries manually). Because the malformed name propagates through the mesh, the temporary presence of a single affected node can degrade BLE management for iOS users across a wide geographical area for an extended period. Less technical users have no straightforward recovery path. Starting in version 2.7.23.b246bcd, the firmware has added input sanitization and regression tests demonstrating recovery for already-poisoned devices. The apps have also taken steps to ensure more graceful handling of malformed encoding sequences as well.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
Meshtastic 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Meshtastic Meshtastic是Meshtastic社区的一款LoRa无线通信设备。 Meshtastic 2.7.23.b246bcd之前版本存在输入验证错误漏洞，该漏洞源于输入验证错误，可能导致通过iOS App管理时，一个带有畸形字符编码的User.long_name广播节点使其他无线电设备无法使用，进而导致BLE同步进入失败/重试循环，并丧失对受影响设备的控制。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
meshtastic firmware < 2.7.23.b246bcd -

二、漏洞 CVE-2026-42566 的公开POC

# POC 描述 源链接 神龙链接
AI 生成 POC 高级
Qwen3.6-35B-A3B · 8144 chars
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完整可执行 POC 代码
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三、漏洞 CVE-2026-42566 的情报信息

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CVE-2026-42566 补丁与修复 (1)

CVE-2026-42566 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: firmware
Same vendor: meshtastic
Same weakness: CWE-20

V. Comments for CVE-2026-42566

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