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Oracle Linux: CVE-2018-12126: ELSA-2019-1181: qemu-kvm security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2018-12126: ELSA-2019-1181: qemu-kvm security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:C/I:N/A:N)
Published
05/14/2019
Created
05/17/2019
Added
05/15/2019
Modified
11/28/2024

Description

Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer.

Solution(s)

  • oracle-linux-upgrade-kernel

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