{"cve":"CVE-2006-1056","nvd":{"published":"2006-04-20T10:02:00.000","modified":"2026-06-16T22:21:56.200","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-310"],"references":["ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:14.fpu.asc","http://kb.vmware.com/kb/2533126","http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.9","http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html","http://lwn.net/Alerts/180820/"],"products":["freebsd:freebsd","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T19:42:01.759833969+00:00"},"epss":{"cve":"CVE-2006-1056","score":0.00459,"percentile":0.39798,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}