[SECURITY] [DSA 5475-1] linux security update
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Debian Security Advisory DSA-5475-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
August 11, 2023 https://www.debian.org/security/faq
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Package : linux
CVE ID : CVE-2022-40982 CVE-2023-20569
CVE-2022-40982
Daniel Moghimi discovered Gather Data Sampling (GDS), a hardware
vulnerability for Intel CPUs which allows unprivileged speculative
access to data which was previously stored in vector registers.
This mitigation requires updated CPU microcode provided in the
intel-microcode package.
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-2023-20569
Daniel Trujillo, Johannes Wikner and Kaveh Razavi discovered
INCEPTION, also known as Speculative Return Stack Overflow (SRSO),
a transient execution attack that leaks arbitrary data on all AMD
Zen CPUs. An attacker can mis-train the CPU BTB to predict non-
architectural CALL instructions in kernel space and use this to
control the speculative target of a subsequent kernel RET,
potentially leading to information disclosure via a speculative
side-channel.
For details please refer to
<https://comsec.ethz.ch/research/microarch/inception/> and
<https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-7005>.
For the oldstable distribution (bullseye), these problems have been fixed
in version 5.10.179-5.
For the stable distribution (bookworm), these problems have been fixed in
version 6.1.38-4.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/linux
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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