Systems with microprocessors utilizing speculative execution and Intel software guard extensions (Intel SGX) may allow unauthorized disclosure of information residing in the L1 data cache from an enclave to an attacker with local user access via a side-channel analysis.
https://www.tenable.com/blog/foreshadow-speculative-execution-attack-targets-intel-sgx
https://www.synology.com/support/security/Synology_SA_18_45
https://www.kb.cert.org/vuls/id/982149
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00161.html
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03874en_us
https://support.f5.com/csp/article/K35558453
https://software.intel.com/security-software-guidance/software-guidance/l1-terminal-fault
https://security.netapp.com/advisory/ntap-20180815-0001/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0008
https://lists.debian.org/debian-lts-announce/2018/09/msg00017.html
https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-254686.pdf
http://www.securitytracker.com/id/1041451
http://www.securityfocus.com/bid/105080
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20180815-01-cpu-en