CVE-2009-4419
Intel Q35, GM45, PM45 Express, Q45, and Q43 Express chipsets in the SINIT Authenticated Code Module (ACM), which allows local users to bypass the Trusted Execution Technology protection mechanism and gain privileges by modifying the MCHBAR register to point to an attacker-controlled region, which prevents the SENTER instruction from properly applying VT-d protection while an MLE is being loaded.
Key facts
- CVSS score
- 7.2 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-16
- EPSS score
- 0.4% (37th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-4386)
- Published
- December 24, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-4386 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- intel / gm45 chipset
- intel / pm45 express chipset
- intel / q35 chipset
- intel / q43 express chipset
- intel / q45 chipset
References
- http://invisiblethingslab.com/resources/misc09/Another%20TXT%20Attack.pdf
- http://osvdb.org/61248
- http://secunia.com/advisories/37900(Vendor Advisory)
- http://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00021&languageid=en-fr(Vendor Advisory)
- http://theinvisiblethings.blogspot.com/2009/12/another-txt-attack.html
- http://www.securityfocus.com/bid/37430
- http://www.securitytracker.com/id?1023382
- http://www.vupen.com/english/advisories/2009/3618(Vendor Advisory)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/54963
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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