CVE-2019-1125

MEDIUM

CPU Speculative Access - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2019-1125. PoCs published by Bitdefender, bitdefender.

AI-analyzed exploit summary This is a proof-of-concept for the SWAPGS attack (CVE-2019-1125), a speculative execution vulnerability affecting Windows x64 systems. The exploit demonstrates kernel memory leakage via two variants, targeting unpatched Windows 7 or newer systems.

Description

An information disclosure vulnerability exists when certain central processing units (CPU) speculatively access memory. An attacker who successfully exploited the vulnerability could read privileged data across trust boundaries. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to elevate user rights directly, but it could be used to obtain information that could be used to try to compromise the affected system further. On January 3, 2018, Microsoft released an advisory and security updates related to a newly-discovered class of hardware vulnerabilities (known as Spectre) involving speculative execution side channels that affect AMD, ARM, and Intel CPUs to varying degrees. This vulnerability, released on August 6, 2019, is a variant of the Spectre Variant 1 speculative execution side channel vulnerability and has been assigned CVE-2019-1125. Microsoft released a security update on July 9, 2019 that addresses the vulnerability through a software change that mitigates how the CPU speculatively accesses memory. Note that this vulnerability does not require a microcode update from your device OEM.

Exploits (2)

exploitdb WORKING POC
by Bitdefender · localwindows
https://www.exploit-db.com/exploits/48071

This is a proof-of-concept for the SWAPGS attack (CVE-2019-1125), a speculative execution vulnerability affecting Windows x64 systems. The exploit demonstrates kernel memory leakage via two variants, targeting unpatched Windows 7 or newer systems.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Complex
Reliability
Theoretical
Target: Windows x64 (7 or newer, unpatched)
No auth needed
Prerequisites: Visual Studio 2015 · Unpatched Windows x64 (7 or newer)
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 41 stars
by bitdefender · poc
https://github.com/bitdefender/swapgs-attack-poc

This repository contains a functional proof-of-concept for the SWAPGS attack (CVE-2019-1125), which exploits speculative execution vulnerabilities in Windows x64 systems to leak kernel memory. The PoC includes assembly and C code to manipulate the GS base register and trigger speculative execution of SWAPGS, allowing arbitrary memory access.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Complex
Reliability
Racy
Target: Windows x64 (7 or newer, unpatched)
No auth needed
Prerequisites: Unpatched Windows x64 system · Visual Studio 2015 for compilation
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (17)

Core 17
Core References
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2600
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2609
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2695
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2696
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2730
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2900
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2899
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:2975
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:3011
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHBA-2019:2824
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:3220
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHBA-2019:3248

Scores

CVSS v3 5.6
EPSS 0.0452
EPSS Percentile 90.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Details

Status published
Products (25)
microsoft/windows_10
microsoft/windows_10 1607
microsoft/windows_10 1703
microsoft/windows_10 1709
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_10 1903
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
... and 15 more
Published Sep 03, 2019
Tracked Since Feb 18, 2026