[RHSA-2021:1739-01] Important: kernel-rt security and bug fix update

Tue May 18 16:51:13 UTC 2021

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Real Time (v. 8) - x86_64
Red Hat Enterprise Linux Real Time for NFV (v. 8) - x86_64

3. 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: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

* kernel: use-after-free caused by a malicious USB device in the
drivers/usb/misc/adutux.c driver (CVE-2019-19523)

* kernel: use-after-free bug caused by a malicious USB device in the
drivers/usb/misc/iowarrior.c driver (CVE-2019-19528)

* kernel: possible out of bounds write in kbd_keycode of keyboard.c
(CVE-2020-0431)

* kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

* kernel: use-after-free in usb_sg_cancel function in
drivers/usb/core/message.c (CVE-2020-12464)

* kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)

* kernel: Use After Free vulnerability in cgroup BPF component
(CVE-2020-14356)

* kernel: NULL pointer dereference in serial8250_isa_init_ports function in
drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)

* kernel: umask not applied on filesystem without ACL support
(CVE-2020-24394)

* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)

* kernel: incomplete permission checking for access to rbd devices
(CVE-2020-25284)

* kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c
(CVE-2020-25285)

* kernel: improper input validation in ppp_cp_parse_cr function leads to
memory corruption and read overflow (CVE-2020-25643)

* kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

* kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)

* kernel: child process is able to access parent mm through hfi dev file
handle (CVE-2020-27835)

* kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)

* kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting
- ->real_parent (CVE-2020-35508)

* kernel: use after free in tun_get_user of tun.c could lead to local
escalation of privilege (CVE-2021-0342)

* kernel: NULL pointer dereferences in ov511_mode_init_regs and
ov518_mode_init_regs in drivers/media/usb/gspca/ov519.c (CVE-2020-11608)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.4 Release Notes linked from the References section.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

1783434 - CVE-2019-19523 kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver
1783507 - CVE-2019-19528 kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver
1831726 - CVE-2020-12464 kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c
1833445 - CVE-2020-11608 kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in drivers/media/usb/gspca/ov519.c
1848652 - CVE-2020-12114 kernel: DoS by corrupting mountpoint reference counter
1853922 - CVE-2020-14314 kernel: buffer uses out of index in ext3/4 filesystem
1868453 - CVE-2020-14356 kernel: Use After Free vulnerability in cgroup BPF component
1869141 - CVE-2020-24394 kernel: umask not applied on filesystem without ACL support
1877575 - CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code
1879981 - CVE-2020-25643 kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow
1882591 - CVE-2020-25285 kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c
1882594 - CVE-2020-25284 kernel: incomplete permission checking for access to rbd devices
1886109 - BUG: using smp_processor_id() in preemptible [00000000] code: handler106/3082 [rhel-rt-8.4.0]
1894793 - After configure hugepage and reboot test server, kernel got panic status.
1895961 - CVE-2020-25704 kernel: perf_event_parse_addr_filter memory
1896842 - host locks up when running stress-ng itimers on RT kernel.
1897869 - Running oslat in RT guest, guest kernel shows Call Trace: INFO: task kcompactd0:35 blocked for more than 600 seconds.
1900933 - CVE-2020-27786 kernel: use-after-free in kernel midi subsystem
1901161 - CVE-2020-15437 kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c
1901709 - CVE-2020-27835 kernel: child process is able to access parent mm through hfi dev file handle
1902724 - CVE-2020-35508 kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent
1903126 - CVE-2020-28974 kernel: slab-out-of-bounds read in fbcon
1915799 - CVE-2021-0342 kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege
1919889 - CVE-2020-0431 kernel: possible out of bounds write in kbd_keycode of keyboard.c
1930246 - CVE-2020-12362 kernel: Integer overflow in Intel(R) Graphics Drivers

6. Package List:

Red Hat Enterprise Linux Real Time for NFV (v. 8):

Source:
kernel-rt-4.18.0-305.rt7.72.el8.src.rpm

x86_64:
kernel-rt-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-core-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-core-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-kvm-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-modules-extra-4.18.0-305.rt7.72.el8.x86_64.rpm

Red Hat Enterprise Linux Real Time (v. 8):

Source:
kernel-rt-4.18.0-305.rt7.72.el8.src.rpm

x86_64:
kernel-rt-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-core-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-core-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debuginfo-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-devel-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-modules-4.18.0-305.rt7.72.el8.x86_64.rpm
kernel-rt-modules-extra-4.18.0-305.rt7.72.el8.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/

7. References:

https://access.redhat.com/security/cve/CVE-2019-19523
https://access.redhat.com/security/cve/CVE-2019-19528
https://access.redhat.com/security/cve/CVE-2020-0431
https://access.redhat.com/security/cve/CVE-2020-11608
https://access.redhat.com/security/cve/CVE-2020-12114
https://access.redhat.com/security/cve/CVE-2020-12362
https://access.redhat.com/security/cve/CVE-2020-12464
https://access.redhat.com/security/cve/CVE-2020-14314
https://access.redhat.com/security/cve/CVE-2020-14356
https://access.redhat.com/security/cve/CVE-2020-15437
https://access.redhat.com/security/cve/CVE-2020-24394
https://access.redhat.com/security/cve/CVE-2020-25212
https://access.redhat.com/security/cve/CVE-2020-25284
https://access.redhat.com/security/cve/CVE-2020-25285
https://access.redhat.com/security/cve/CVE-2020-25643
https://access.redhat.com/security/cve/CVE-2020-25704
https://access.redhat.com/security/cve/CVE-2020-27786
https://access.redhat.com/security/cve/CVE-2020-27835
https://access.redhat.com/security/cve/CVE-2020-28974
https://access.redhat.com/security/cve/CVE-2020-35508
https://access.redhat.com/security/cve/CVE-2021-0342
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

8. Contact:

The Red Hat security contact is <secalert at redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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