QID 239620

Date Published: 2021-09-13

QID 239620: Red Hat Update for kernel (RHSA-2021:3438)

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

Security Fix(es): kernel: use-after-free in route4_change()
in net/sched/cls_route.c (CVE-2021-3715)

Affected Products:

Red Hat Enterprise Linux Server 7 x86_64
Red Hat Enterprise Linux Workstation 7 x86_64
Red Hat Enterprise Linux Desktop 7 x86_64
Red Hat Enterprise Linux for IBM z Systems 7 s390x
Red Hat Enterprise Linux for Power, big endian 7 ppc64
Red Hat Enterprise Linux for Scientific Computing 7 x86_64
Red Hat Enterprise Linux for Power, little endian 7 ppc64le
Red Hat Virtualization Host 4 for RHEL 7 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 V2 rated as High - 7.5 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-2021:3438 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239620

    CVE-2021-3715 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:3438 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:3438?language=en
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