Severity High
Remote No
Type Access restriction bypass
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization).
This variant triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks.
Group Package Affected Fixed Severity Status Ticket
AVG-585 nvidia-340xx-dkms 340.104-20 High Vulnerable
AVG-584 nvidia-dkms 340.104-20 High Vulnerable
AVG-583 linux-firmware 20171206.fdee922-1 High Vulnerable FS#56951
AVG-581 nvidia-340xx-lts 340.104-7 High Vulnerable
AVG-580 nvidia-340xx 340.104-20 High Vulnerable
AVG-579 nvidia-lts 387.34-5 High Vulnerable
AVG-578 nvidia 387.34-18 High Vulnerable
AVG-559 linux-lts 4.9.74-1 High Vulnerable
AVG-558 linux-hardened 4.14.11.a-1 High Vulnerable
AVG-557 linux-zen 4.14.11-1 High Vulnerable
AVG-553 linux 4.14.11-1 High Vulnerable
AVG-582 intel-ucode 20171117-1 20180108-1 High Fixed
Date Advisory Group Package Severity Description
10 Jan 2018 ASA-201801-10 AVG-582 intel-ucode High access restriction bypass
Related issues: CVE-2017-5754 CVE-2017-5753