QID 239237

QID 239237: Red Hat Update for kernel (RHSA-2021:1288)

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

Security Fix(es): kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661) kernel: out-of-bounds read in libiscsi module (CVE-2021-27364) kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365) kernel: increase slab leak leads to DoS (CVE-2021-20265)

Affected Products:

Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

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 - 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-2021:1288 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239237

    CVE-2020-29661 | CVE-2021-20265 | CVE-2021-27364 | CVE-2021-27365 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:1288 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:1288?language=en
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