QID 239202

Date Published: 2021-04-08

QID 239202: Red Hat Update for kernel (RHSA-2021:1093)

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

Security Fix(es): kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466) kernel: SCSI target (LIO)
write to any block on ILO backstore (CVE-2020-28374) kernel: Use after free via PI futex state (CVE-2021-3347) kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708) kernel: out-of-bounds read in libiscsi module (CVE-2021-27364) kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365) Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152) kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

Affected Products:

Red Hat Enterprise Linux for x86_64 8 x86_64
Red Hat Enterprise Linux for IBM z Systems 8 s390x
Red Hat Enterprise Linux for Power, little endian 8 ppc64le
Red Hat Enterprise Linux for ARM 64 8 aarch64
Red Hat CodeReady Linux Builder for x86_64 8 x86_64
Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
Red Hat CodeReady Linux Builder for ARM 64 8 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 Critical - 8.1 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-2021:1093 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239202

    CVE-2020-0466 | CVE-2020-27152 | CVE-2020-28374 | CVE-2021-3347 | CVE-2021-26708 | CVE-2021-27363 | CVE-2021-27364 | CVE-2021-27365 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:1093 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:1093?language=en
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