{"id":"CVE-2006-1056","url":"https://www.cyber-defence.io/tools/cve/CVE-2006-1056","generatedAt":"2026-10-27T21:44:20.540Z","title":"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…","description":"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.","published":"2006-04-20T10:02:00.000Z","lastModified":"2026-06-16T22:21:56.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":2.1,"severity":"LOW","vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N"},"cwe":["CWE-310"],"affected":["freebsd/freebsd","linux/linux kernel"],"epss":{"score":0.00459,"percentile":0.39534,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.46%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:14.fpu.asc","source":"secalert@redhat.com"},{"url":"http://kb.vmware.com/kb/2533126","source":"secalert@redhat.com"},{"url":"http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.9","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html","source":"secalert@redhat.com"},{"url":"http://lwn.net/Alerts/180820/","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=linux-kernel&m=114548768214478&w=2","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/19715","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/19724","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/19735","tags":["Vendor 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Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/22875","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/22876","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://security.freebsd.org/advisories/FreeBSD-SA-06:14-amd.txt","source":"secalert@redhat.com"},{"url":"http://securitytracker.com/id?1015966","source":"secalert@redhat.com"},{"url":"http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm","source":"secalert@redhat.com"},{"url":"http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2006/dsa-1097","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2006/dsa-1103","source":"secalert@redhat.com"},{"url":"http://www.novell.com/linux/security/advisories/2006-05-31.html","source":"secalert@redhat.com"},{"url":"http://www.osvdb.org/24746","source":"secalert@redhat.com"},{"url":"http://www.osvdb.org/24807","source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2006-0437.html","source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2006-0575.html","source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2006-0579.html","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/431341","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/451404/100/0/threaded","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/451417/100/200/threaded","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/451419/100/200/threaded","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/451421/100/0/threaded","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/17600","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/usn-302-1","source":"secalert@redhat.com"},{"url":"http://www.vmware.com/download/esx/esx-213-200610-patch.html","source":"secalert@redhat.com"},{"url":"http://www.vmware.com/download/esx/esx-254-200610-patch.html","source":"secalert@redhat.com"},{"url":"http://www.vupen.com/english/advisories/2006/1426","tags":["Vendor 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Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=187910","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=187911","source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/25871","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9995","source":"secalert@redhat.com"},{"url":"ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:14.fpu.asc","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://kb.vmware.com/kb/2533126","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.9","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lwn.net/Alerts/180820/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=linux-kernel&m=114548768214478&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/19715","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/19724","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/19735","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/20398","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2006-1056","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}