CVE-2006-1056

Low

The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the state of floating point instructions of other processes, which can be leveraged to obtain sensitive information such as cryptographic keys. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.

Package Linux Kernel
Published 2006-04-20
Last modified 2026-04-16
CVSS version 2.0
Patch available
Awaiting data

CVSS 2.0 score

2.1

out of 10
Low
Attack Vector
Local
Attack Complexity
Low
Privileges Required
User Interaction
Scope
Confidentiality
Low
Integrity
None
Availability
None
Vector string
AV:L/AC:L/Au:N/C:P/I:N/A:N

Weakness type

CWE-310

CVE-2006-1056 is classified as CWE-310

See CWE-310 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2006-1056 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2006-1056?

    CVE-2006-1056 is a Low severity Linux kernel vulnerability with a CVSS score of 2.1 out of 10 . CVE-2006-1056 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2006-1056?

    CVE-2006-1056 has a CVSS score of 2.1 out of 10, rated Low severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:P/I:N/A:N .

  • Is there a patch available for CVE-2006-1056?

    No patch is currently available for CVE-2006-1056. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2006-1056 actively exploited?

    No — CVE-2006-1056 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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