CVE-2026-56920 Google CVE debrief

Who should care

Defenders responsible for Android systems, vulnerability management teams, and security researchers should assess exposure and prioritize patching due to the potential for remote code execution with no additional execution privileges needed. They should also monitor for potential exploitation attempts and review compensating controls for exposed systems.

Why it matters

Defenders should prioritize verifying and applying patches from Google, assessing exposure in Android systems, and monitoring for potential exploitation attempts due to the potential for remote code execution.

• Potential remote code execution with no additional execution privileges needed
• Out-of-bounds write due to logic error in fw_hevc_dec_header.c

Technical summary

A logic error in the s_decode_vui_param function of fw_hevc_dec_header.c could lead to a remote out-of-bounds write, potentially allowing remote code execution with no additional execution privileges needed. This issue affects Android systems, and defenders should assess exposure and prioritize patching. The vulnerability has a CVSS score of 8.8 and is considered HIGH severity. User interaction is not required for exploitation. The CVE record and NVD entry provide details on the vulnerability, including its CVSS score and potential impact.

Defensive priority

Defenders should prioritize verifying and applying patches from Google, assessing exposure in Android systems, and monitoring for potential exploitation attempts.

Recommended defensive actions

• Verify and apply patches from Google
• Assess exposure in Android systems
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions, retest remediated assets
• Confirm whether affected product deployments exist in managed environments

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 8.8 and potential impact of remote code execution. However, specific details on affected versions and remediation are limited. Defenders should verify and apply patches from Google, assess exposure in Android systems, and monitor for potential exploitation attempts. The vulnerability is a logic error in the s_decode_vui_param function of fw_hevc_dec_header.c, which could lead to a remote out-of-bounds write.

Sources and 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.