QID 239762

Date Published: 2021-11-03

QID 239762: Red Hat Update for kernel-rt (RHSA-2021:4088)

the kernel-rt packages provide the real time linux kernel, which enables fine-tuning for systems with extremely high determinism requirements.

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 real time 8 x86_64
  • Red Hat enterprise linux for real time for nfv 8 x86_64
  • Red Hat enterprise linux for real time - telecommunications update service 8.4 x86_64
  • Red Hat enterprise linux for real time for nfv - telecommunications update service 8.4 x86_64



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-2021:4088 Update to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239762

    CVE-2020-36385 | CVE-2021-0512 | CVE-2021-3656 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:4088 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:4088
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