RHSA-2022:0065 - Security Advisory

Topic

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

Red Hat Product Security has rated this update as having a security impact of Moderate. 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)
• kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations (CVE-2020-36322)
• kernel: Heap buffer overflow in firedtv driver (CVE-2021-42739)

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):

• kernel-rt: update to the latest RHEL7.9.z11 source tree (BZ#2022891)

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 for Real Time 7 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 7 x86_64

Fixes

• BZ - 1895961 - CVE-2020-25704 kernel: perf_event_parse_addr_filter memory
• BZ - 1949560 - CVE-2020-36322 kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations
• BZ - 1951739 - CVE-2021-42739 kernel: Heap buffer overflow in firedtv driver

CVEs

• CVE-2020-25704
• CVE-2020-36322
• CVE-2021-42739

References

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