RedHat: RHSA-2021-3044:01 Important: kpatch-patch security update
Summary
This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: race condition in net/can/bcm.c leads to local privilege
escalation (CVE-2021-3609)
* 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)
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.
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
References
https://access.redhat.com/security/cve/CVE-2021-3609 https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
kpatch-patch-4_18_0-305-1-4.el8.src.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.src.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.src.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.src.rpm
ppc64le:
kpatch-patch-4_18_0-305-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305-debuginfo-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305-debugsource-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.ppc64le.rpm
x86_64:
kpatch-patch-4_18_0-305-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305-debuginfo-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305-debugsource-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.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 kpatch-patch is now available for Red Hat Enterprise Linux 8.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 BaseOS (v. 8) - ppc64le, x86_64
Bugs Fixed
1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
1971651 - CVE-2021-3609 kernel: race condition in net/can/bcm.c leads to local privilege escalation
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c