Shulou(Shulou.com)11/24 Report--

CTOnews.com, Nov. 10, Microsoft released security patches for Windows 11, Windows 10, Windows 8.1 and Windows 7 yesterday.

According to reports, the latest November patch fixes a Spectre Variant 2 vulnerability, including the AMD CPU vulnerability codenamed "CVE-2022-23824", which affects almost all AMD Auron, EPYC and Speedo desktops, laptops and server processors, but the Ryzen 7000 series chips are not affected.

In a report released earlier today, AMD described this new security vulnerability:

Announcement number: AMD-SB-1040

Potential impact: information disclosure

Severity: medium

AMD is aware of a potential vulnerability affecting AMD CPU, where the operating system relies on IBPB to refresh the return address predictor. This may allow CVE-2017-5715 (formerly known as Spectre Variant 2) to refresh the return address predictor in cases where the operating system relies on IBPB without using additional software mitigation.

Cve-2022-23824

IBPB cannot prevent the former branch target of IBPB from specifying the return branch prediction, which leads to potential information disclosure.

CTOnews.com has learned that the products affected include:

Desktop AMD Speed Dragon ™X4 processor

AMD Ruilong ™Threadripper ™PRO processor

Second generation AMD Ryzen ™Threadripper ™processor

The third generation AMD Ryzen ™Threadripper ™processor

Seventh generation AMD A series APU

AMD Ryzen ™2000 Series Desktop processor

AMD Ryzen ™3000 Series Desktop processor

AMD Ryzen ™4000 Series Desktop processors with Radeon ™Video Card

Mobile AMD Ruilong 2000 Series Mobile processor

AMD Athlon ™3000 Series Mobile processor with Radeon ™Video Card

AMD Ryzen ™3000 series mobile processors or second generation AMD Ryzen ™mobile processors with Radeon ™graphics card

AMD Ryzen ™4000 Series Mobile processor with Radeon ™Video Card

AMD Ryzen ™5000 Series Mobile processor with Radeon ™Video Card

Chromebook AMD Athlon ™Mobile processor with Radeon ™graphics card

The first generation of server AMD EPYC processor

The second generation AMD EPYC processor

The third generation AMD EPYC processor

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