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CVE-2026-80335— Out-of-bounds Write in Bootloader

Quick assessment

Affected
Unisoc (Shanghai) Technologies Co., Ltd. Bootloader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在引导加载程序的下载模块中，由于固件更新会话期间未能重置全局偏移变量，可能导致越界写入。该漏洞可能引发堆内存损坏、系统崩溃，甚至允许攻击者在无需额外执行权限的情况下实现任意代码执行。

CVSS 8.4 · High
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I. Basic Information for CVE-2026-80335

Vulnerability Information
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Vulnerability Title
Out-of-bounds Write in Bootloader
Source: CVE Program / CVE List V5
Vulnerability Description
In the bootloader download module, there is a possible out-of-bounds write due to a failure to reset a global offset variable during firmware update sessions. This could lead to heap memory corruption, system crash, or potential arbitrary code execution with no additional execution privileges needed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unisoc (Shanghai) Technologies Co., Ltd. Bootloader SC9863A -

II. Public POCs for CVE-2026-80335

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-80335

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Other References for CVE-2026-80335 (2)

IV. Related Vulnerabilities

Same vendor: Unisoc (Shanghai) Technologies Co., Ltd.
Same weakness: CWE-787