|Related CVEs||CVE-2022-40982 CVE-2023-20569|
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>.
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 Debian 9 stretch, these problems have been fixed in version 5.10.179-5~deb9u1.
We recommend that you upgrade your linux-5.10 packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.