What’s Vulnerable › Vulnerabilities

CVE-2023-31096

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-10-10 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered in Broadcom) LSI PCI-SV92EX Soft Modem Kernel Driver through 2.2.100.1 (aka AGRSM64.sys). There is Local Privilege Escalation to SYSTEM via a Stack Overflow in RTLCopyMemory (IOCTL 0x1b2150). An attacker can exploit this to elevate privileges from a medium-integrity process to SYSTEM. This can also be used to bypass kernel-level protections such as AV or PPL, because exploit code runs with high-integrity privileges and can be used in coordinated BYOVD (bring your own vulnerable driver) ransomware campaigns.

Affected products

• Broadcom Lsi Pci-Sv92Ex Firmware: through 2.2.100.1

References

• https://cschwarz1.github.io/posts/0x04/
• https://www.broadcom.com
• https://cschwarz1.github.io/posts/0x04/
• https://www.broadcom.com

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