CVE-2026-25268 wsa8835 firmware vulnerability

Who is affected

How to fix it

Qualcomm WSA8835 firmware is affected by CVE-2026-25268, a memory corruption risk. Memory Corruption when processing invalid HT40 channel layouts during dynamic channel switching operations. The recommended remediation is to update to OEM firmware that incorporates the Qualcomm July 2026 security bulletin fixes for affected WSA8835/Snapdragon components. Until the update is complete, deploy OEM firmware updates, reduce wireless attack exposure where possible, and monitor dynamic channel switching behavior, review logs, and reduce exposure of the affected service, firmware path, or build workflow.

1. Inventory every deployment, package, firmware image, appliance, device family, container, build runner, or service that uses Qualcomm WSA8835 firmware.
2. Confirm the installed version or firmware build and compare it with the affected hardware, firmware, or software versions listed in the source advisory and the source advisory for CVE-2026-25268.
3. Apply the vendor-supported fix: update to OEM firmware that incorporates the Qualcomm July 2026 security bulletin fixes for affected WSA8835/Snapdragon components.
4. If the update cannot be applied immediately, deploy OEM firmware updates, reduce wireless attack exposure where possible, and monitor dynamic channel switching behavior; disable unnecessary public access, endpoints, uploads, build inputs, hardware features, or high-risk integrations until patched.
5. Review application, device, kernel, firmware, build, package manager, container, authentication, and audit logs for activity related to CVE-2026-25268.
6. Rotate sessions, API tokens, service credentials, signing keys, integration keys, and administrator passwords if logs or affected data indicate compromise, code execution, credential exposure, or unauthorized access.
7. Clear caches, restart affected services, rebuild affected containers or firmware images when appropriate, and remove temporary files, generated artifacts, stored payloads, or unsafe configuration created during exploitation attempts.

Verify the fix

• Confirm Qualcomm WSA8835 firmware now reports OEM firmware that incorporates the Qualcomm July 2026 security bulletin fixes for affected WSA8835/Snapdragon components or a later vendor-supported fixed release/build for the deployed branch or device family.
• Verify the affected workflow no longer allows the behavior described in CVE-2026-25268, using a safe regression test, vendor validation method, or firmware/package inventory check.
• Review logs after remediation for continued exploit attempts, denial-of-service symptoms, suspicious redirects, unauthorized requests, file access, memory corruption symptoms, or configuration changes.
• Rerun a Fixnx scan and any product-specific scanner, package audit, firmware inventory, device health check, or manual regression test relevant to the affected service.
• Document affected assets, fixed versions, mitigation decisions, validation evidence, and any cleanup, rebuild, or credential rotation performed.

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