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CVE-2023-31096 is a local elevation-of-privilege vulnerability in the Broadcom LSI PCI-SV92EX Soft Modem kernel driver through version 2.2.100.1, associated with the Agere soft modem driver lineage. The flaw is a stack overflow in the driver's handling of an IOCTL request, specifically involving RTLCopyMemory for IOCTL 0x1b2150. A local attacker can trigger the vulnerable code path from a medium-integrity process and achieve execution in kernel context, resulting in escalation to SYSTEM. Because the vulnerable component is a signed kernel driver present on supported Windows systems, the issue is also relevant to bring-your-own-vulnerable-driver abuse scenarios.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Elevation of privilege vulnerability in the Windows Agere Soft Modem Driver; publicly disclosed but with no indication of exploitation in the wild per the content.
An elevation of privilege vulnerability affecting legacy Windows modem/serial-related drivers that Microsoft later decommissioned/disabled in Windows 11 cumulative updates due to security risk.
A Microsoft-reported zero-day vulnerability addressed in the January 2026 Patch Tuesday release; the content does not provide technical details beyond inclusion in the update.
An elevation of privilege vulnerability in the Windows Agere Soft Modem driver (noted as removed).
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.