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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| broadcom | lsi_pci-sv92ex_firmware | 2.2.100.1 |
References
- https://cschwarz1.github.io/posts/0x04/Exploit, Third Party Advisory
- https://www.broadcom.comNot Applicable
- https://cschwarz1.github.io/posts/0x04/Exploit, Third Party Advisory
- https://www.broadcom.comNot Applicable
Timeline
- Published
- Oct 10, 2023
- Last modified
- Jun 17, 2026
- NVD status
- Modified