RHSA-2021:2718HighCVSS 7.8

Red Hat Security Advisory: kernel security and bug fix update

Published
July 20, 2021
Last Modified
November 5, 2026

🔗 CVE IDs covered (5)

CVE-2021-33034 →CVE-2021-33909 →CVE-2020-25704 →CVE-2020-26541 →CVE-2020-35508 →

📋 Description

CVE-2020-25704 — kernel: perf_event_parse_addr_filter memory CVE-2020-26541 — kernel: security bypass in certs/blacklist.c and certs/system_keyring.c CVE-2020-35508 — kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent CVE-2021-33034 — kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan CVE-2021-33909 — kernel: size_t-to-int conversion vulnerability in the filesystem layer

🎯 Affected products122

  • Red Hat CodeReady Linux Builder EUS (v. 8.2)
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-0:4.18.0-193.60.2.el8_2.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-abi-whitelists-0:4.18.0-193.60.2.el8_2.noarch as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-core-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-core-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-core-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-core-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.60.2.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-core-0:4.18.0-193.60.2.el8_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-core-0:4.18.0-193.60.2.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • kernel-debug-core-0:4.18.0-193.60.2.el8_2.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.2)
  • +92 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible. Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

🔗 References (9)