QID 239454

Date Published: 2021-07-05

QID 239454: Red Hat Update for kernel-rt (RHSA-2021:2169)

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: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501) kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)

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 - 7.1 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:2169 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239454

    CVE-2021-3501 | CVE-2021-3543 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:2169 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:2169?language=en
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