RHSA-2022:5232 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

• kernel: race condition in perf_event_open leads to privilege escalation (CVE-2022-1729)
• kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root (CVE-2022-1966)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• XFS inode cluster corruption (BZ#2050464)
• sock: sock_dequeue_err_skb() needs hard irq safety (BZ#2070408)
• libceph: fix potential use-after-free on linger ping and resends (BZ#2088025)

Solution

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.

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

Fixes

• BZ - 2086753 - CVE-2022-1729 kernel: race condition in perf_event_open leads to privilege escalation
• BZ - 2092427 - CVE-2022-1966 kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root

CVEs

• CVE-2022-1729
• CVE-2022-1966
• CVE-2022-32250

References

• https://access.redhat.com/security/updates/classification/#important