QID 239599

Date Published: 2021-09-02

QID 239599: Red Hat Update for kernel (RHSA-2021:3363)

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es): kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609) kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543) kernel: out-of-bounds write in xt_compat_target_from_user()
in net/netfilter/x_tables.c (CVE-2021-22555) kernel: race condition for removal of the HCI controller (CVE-2021-32399)

Affected Products:

Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2 x86_64
Red Hat Enterprise Linux Server - AUS 8.2 x86_64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
Red Hat Enterprise Linux Server - TUS 8.2 x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.2 ppc64le
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 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 Medium - 4.6 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-2021:3363 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239599

    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:3363 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:3363?language=en