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PatchSiren cyber security CVE debrief

CVE-2026-87765 Unisoc (Shanghai) Technologies Co., Ltd. CVE debrief

A possible out-of-bounds read or hardware register corruption issue was found in the kernel apsys DVFS driver due to improper input validation of the frequency index. This could lead to system instability or denial of service with local privileges. The issue was identified in the kernel apsys DVFS driver, which is responsible for managing dynamic voltage and frequency scaling. The vulnerability has a medium severity level and could be exploited by local attackers to cause system instability or denial of service. However, Unisoc's security bulletin is not accessible, limiting further verification and analysis. System administrators and security teams should assess exposure and take

Vendor
Unisoc (Shanghai) Technologies Co., Ltd.
Product
kernel
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-12
Original CVE updated
2026-10-12
Advisory published
2026-10-12
Advisory updated
2026-10-12

Who should care

System administrators and security teams responsible for systems using the affected kernel apsys DVFS driver should assess exposure and prioritize verification.

Why it matters

CVE-2026-87765 is a medium-severity vulnerability in the kernel apsys DVFS driver that could lead to system instability or denial of service with local privileges. System administrators and security teams should assess exposure and prioritize verification of affected systems, especially those with local access. However, Unisoc's security bulletin is not accessible, limiting further verification.

  • System instability or denial of service with local privileges.

Technical summary

The kernel apsys DVFS driver has a possible out-of-bounds read or hardware register corruption issue due to improper input validation of the frequency index. This could lead to system instability or denial of service with local privileges. The vulnerability is caused by inadequate validation of the frequency index, which could allow local attackers to access sensitive hardware registers or read data out of bounds. To mitigate this vulnerability, system administrators and security teams should assess exposure and prioritize verification of affected systems, apply

Defensive priority

Assess exposure and prioritize verification of affected systems, especially those with local access.

Recommended defensive actions

  • Assess exposure and prioritize verification of affected systems, especially those with local access.
  • Verify system configurations and apply patches or mitigations as available.
  • Monitor system stability and performance for potential anomalies.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, Unisoc's security bulletin is not accessible, limiting further verification.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-87765 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-87765

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-87765 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-87765

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.