🛡️ CVE-2023-31096 — lsi-pci-sv92ex-firmware

🟠 CVSS 7.8 — High ⚠️ Exploit Public CWE-787 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2023-31096 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2023-31096 is recorded against 1 package.

  • lsi-pci-sv92ex-firmware (fixed in 2.2.100.1)

Timeline and source

Published on 10 October 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

cschwarz1.github.io
www.broadcom.com
cschwarz1.github.io
www.broadcom.com

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-787
Public Exploit ⚠️ Yes
Source NVD
Published 2023-10-10
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
lsi-pci-sv92ex-firmware — 2.2.100.1

References

Exploit, Third Party Advisory https://cschwarz1.github.io/posts/0x04/
Not Applicable https://www.broadcom.com
Exploit, Third Party Advisory https://cschwarz1.github.io/posts/0x04/
Not Applicable https://www.broadcom.com

Exploit Protection

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CVE-2023-31096 carries CVSS 7.8 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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