CVE-2021-3444Microsoft CVSS 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Microsoft security update for CVE-2021-3444

Published
March 25, 2021
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2021-3444 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-3444. This page also shows what EchelonGraph holds for CVE-2021-3444, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products16

  • kernel-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-debuginfo-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-debuginfo-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-devel-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-devel-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-docs-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-docs-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-drivers-accessibility-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-drivers-accessibility-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-drivers-sound-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-drivers-sound-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-dtb-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-oprofile-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64
  • kernel-tools-5.10.57.1-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARM
  • kernel-tools-5.10.57.1-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64

✅ Updates Microsoft lists: 1 update

1 row: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update-

🧭 EchelonGraph on CVE-2021-3444

EchelonGraph score
7.8 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

Published by Canonical Ltd., the CVE Numbering Authority that assigned CVE-2021-3444, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (2)