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PatchSiren cyber security CVE debrief

CVE-2026-56915 Google CVE debrief

A race condition in bigo_worker_thread of bigo.c could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. This vulnerability affects Android systems, particularly those with System execution privileges. Defenders should assess exposure and verify privileges to mitigate potential risks. The vulnerability has a CVSS score of 6.4 and a severity of MEDIUM. The CVE record and NVD entry provide details on the vulnerability.

Vendor
Google
Product
Android
CVSS
MEDIUM 6.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-15
Original CVE updated
2026-09-21
Advisory published
2026-09-15
Advisory updated
2026-09-21

Who should care

Defenders of Android systems, particularly those with System execution privileges, should assess exposure and verify privileges to mitigate potential risks. This includes reviewing the CVE record and NVD entry for additional information on the vulnerability and its potential impacts. Defenders should also consider implementing compensating controls and monitoring for potential exploitation attempts.

Why it matters

Defenders of Android systems should assess exposure to a race condition in bigo_worker_thread of bigo.c, which could lead to local escalation of privilege with System execution privileges needed.

  • Verify System execution privileges on affected Android systems
  • Assess exposure to the race condition in bigo_worker_thread of bigo.c

Technical summary

A race condition in bigo_worker_thread of bigo.c could lead to local escalation of privilege with System execution privileges needed. This vulnerability affects Android systems and has a CVSS score of 6.4 and a severity of MEDIUM. The vulnerability requires System execution privileges and user interaction is not needed for exploitation. Defenders should assess exposure and verify privileges to mitigate potential risks.

Defensive priority

Assess exposure and verify System execution privileges on affected Android systems.

Recommended defensive actions

  • Assess exposure and verify System execution privileges on affected Android systems
  • Review and apply vendor advisory
  • Monitor for exploitation attempts

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but vendor advisory details are limited. The vulnerability has a CVSS score of 6.4 and a severity of MEDIUM. The CVE record was published on 2026-09-15T19:17:26.567Z and has not been modified since then. The NVD entry provides additional information on the vulnerability, including its description and potential impacts.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-56915 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-56915

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

  • CVE-2026-56915 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-56915

    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.