QID 239771

Date Published: 2021-11-03

QID 239771: Red Hat Update for kernel security (RHSA-2021:4056)

the kernel packages contain the linux kernel, the core of any linux operating system.

Security Fix(es):
  • kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (cve-2020-36385)
  • kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (cve-2021-0512)
  • kernel: svm nested virtualization issue in kvm (vmload/vmsave) (cve-2021-3656)

Affected Products:

  • Red Hat enterprise linux for x86_64 - extended update support 8.4 x86_64
  • Red Hat enterprise linux server - aus 8.4 x86_64
  • Red Hat enterprise linux for ibm z systems 8 s390x
  • Red Hat enterprise linux for ibm z systems - extended update support 8.4 s390x
  • Red Hat enterprise linux for power, little endian 8 ppc64le
  • Red Hat enterprise linux for power, little endian - extended update support 8.4 ppc64le
  • Red Hat virtualization host 4 for rhel 8 x86_64
  • Red Hat enterprise linux for x86_64 8 x86_64
  • Red Hat enterprise linux server - tus 8.4 x86_64
  • Red Hat enterprise linux for arm 64 8 aarch64
  • Red Hat enterprise linux server (for ibm power le) - update services for sap solutions 8.4 ppc64le
  • Red Hat enterprise linux server - update services for sap solutions 8.4 x86_64
  • Red Hat codeready linux builder for x86_64 8 x86_64
  • Red Hat codeready linux builder for power, little endian 8 ppc64le
  • Red Hat codeready linux builder for arm 64 - extended update support 8.4 aarch64



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 6.8 severity.
    • Solution
    Upgrade to the latest packages which contain a patch.

    Refer to Refer to :
    Applying Package Updates to RHEL system     for details.

    Refer to Red Hat security advisory RHSA-2021:4056 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239771

    CVE-2020-36385 | CVE-2021-0512 | CVE-2021-3656 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4056 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4056
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