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Mallory
High

Remote DoS in Unisoc modem input validation

IdentifiersCVE-2025-31717CWE-20

CVE-2025-31717 is a vulnerability in a Unisoc modem component caused by improper input validation. According to the provided content, malformed or otherwise invalid input to the modem can trigger a system crash. The issue is described as remotely triggerable and results in denial of service. No further technical detail about the specific vulnerable function, parser, protocol handler, or affected product/version is provided in the available content.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

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Successful exploitation can cause a system crash, resulting in remote denial of service. Based on the provided information, the primary impact is loss of availability of the affected device or modem-related functionality. The content does not indicate code execution, privilege escalation, or information disclosure.

Mitigation

If you can’t patch tonight, do this now.

Until patches are deployed, reduce exposure of the modem attack surface where operationally feasible. Practical mitigations may include limiting untrusted network exposure, prioritizing carrier/OEM firmware updates for affected devices, and accelerating deployment of the December 2025 Android security updates or vendor-equivalent releases. Specific compensating controls are not described in the provided content.

Remediation

Patch, then assume compromise.

Apply the vendor/OEM security update that includes the fix for CVE-2025-31717. The provided content places this issue among Unisoc modem vulnerabilities addressed in the December 2025 Android security update cycle, so remediation depends on installing the relevant vendor firmware or OEM-integrated patch level that incorporates the Unisoc modem fix.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3

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