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  4. CVE 2026 80335 out of bounds write in bootloader
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Back to active CVEs
High · CVSS 8.4CVE-2026-80335

Out-of-bounds Write in BootloaderCVE-2026-80335

Answer in brief

CVE-2026-80335 records a High severity (CVSS 8.4) vulnerability in Out-of-bounds Write in Bootloader. The current sources do not mark it as known exploited. The current feed maps Unisoc (Shanghai) Technologies Co., Ltd./Bootloader (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unisoc (Shanghai) Technologies Co., Ltd./Bootloader (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unisoc (Shanghai) Technologies Co., Ltd./BootloadergenericSC9863A || SC9832E || SC7731E || T310 || T610 || T618 || T7200 || T7225 || T7250 || T7255 || T7280 || T8100 || T9100 || T8200 || T7300 || T8300Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unisoc (Shanghai) Technologies Co., Ltd./Bootloader.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • Source referenceunisoc.com
  • Source referenceunisoc.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • libwebsockets MQTT Protocol PUBACK Packet Handling Out-Of-Bounds Write Remote Code Execution VulnerabilityAlso CWE-787
  • Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds writeAlso CWE-787
  • Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds writeAlso CWE-787

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record