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Kernel: Mesa, CVE-2020-28588, Turbostat

Submitted by Roy Schestowitz on Wednesday 5th of May 2021 08:39:54 AM Filed under
Graphics/Benchmarks
Linux
  • Mesa Fixes Up The Recent L3 Cache Pinning Rework - Phoronix

    Going on for a few years now has been some Mesa optimizations for AMD Ryzen CPUs and in particular L3 cache optimizations. There is now a fix to re-enable this support after it was mistakenly broken earlier this year.

    Back in March and back-ported to stable with Mesa 21.0.2 was an effort to improve the AMD L3 cache calculation code. This was due to the prior code breaking on dual socket AMD EPYC systems checked, but it turns out that fix was broken itself.

  • Linux kernel vulnerability discovered, fixed. Ghostwriter tied to UNC1151. Online ordering platforms breached.

    Researchers at Cisco Talos have discovered an information disclosure vulnerability (CVE-2020-28588) in the Linux kernel. An update is now available that fixes the issue. According to Shachar Menashe, VP Security, Vdoo, a specialist in product security, the vulnerability looks like an easy one to exploit:

    “This newly discovered vulnerability indeed looks very actionable and easy to exploit under the right technical conditions, so we recommend affected vendors to update their kernel or apply the patch. These kinds of vulnerabilities are almost exclusively used as part of a local privilege escalation attack chain to circumvent the Linux kernel randomization (KASLR) mitigation.

  • Turbostat For Linux 5.13 Brings AMD Zen Fix, New Intel CPU Support - Phoronix

    The Turbostat utility that lives within the Linux kernel source tree for reporting on CPU topology and various power/frequency metrics has some useful additions pending for the Linux 5.13 kernel.

    With Turbostat's development being led by Intel and their significant engineering resources, it's no surprise they are always punctual in their new enablement support. With Linux 5.13 the Turbostat tool adds support for Alder Lake mobile processors as well as Ice Lake D. There are also fixes/tweaks to existing CPU support.

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