RedHat: RHSA-2021-3725:01 Important: kernel security and bug fix update
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO
checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption
(CVE-2021-37576)
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):
* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap
[7.9.z] (BZ#1975161)
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-32399 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Server AUS (v. 7.4):
Source:
kernel-3.10.0-693.94.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-693.94.1.el7.noarch.rpm
kernel-doc-3.10.0-693.94.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debug-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.94.1.el7.x86_64.rpm
kernel-devel-3.10.0-693.94.1.el7.x86_64.rpm
kernel-headers-3.10.0-693.94.1.el7.x86_64.rpm
kernel-tools-3.10.0-693.94.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-693.94.1.el7.x86_64.rpm
perf-3.10.0-693.94.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
python-perf-3.10.0-693.94.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.4):
x86_64:
kernel-debug-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-693.94.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-693.94.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-693.94.1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.4Advanced Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64
Bugs Fixed
1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c
1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption