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Debian Security Advisory DSA-5474-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
August 11, 2023                       https://www.debian.org/security/faq
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Package        : intel-microcode
CVE ID         : CVE-2022-40982 CVE-2022-41804 CVE-2023-23908
Debian Bug     : 1043305

This update ships updated CPU microcode for some types of Intel CPUs and
provides mitigations for security vulnerabilities.

CVE-2022-40982

    Daniel Moghimi discovered Gather Data Sampling (GDS), a hardware
    vulnerability which allows unprivileged speculative access to data
    which was previously stored in vector registers.

    For details please refer to
    <https://downfall.page/> and
    <https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/gather-data-sampling.html>.

CVE-2022-41804

    Unauthorized error injection in Intel SGX or Intel TDX for some
    Intel Xeon Processors which may allow a local user to potentially
    escalate privileges.

CVE-2023-23908

    Improper access control in some 3rd Generation Intel Xeon Scalable
    processors may result in an information leak.

For the oldstable distribution (bullseye), these problems have been fixed
in version 3.20230808.1~deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 3.20230808.1~deb12u1.

We recommend that you upgrade your intel-microcode packages.

For the detailed security status of intel-microcode please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/intel-microcode

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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