-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

====================================================================                   
Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:2725-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2725
Issue date:        2021-07-20
CVE Names:         CVE-2019-20934 CVE-2020-11668 CVE-2021-33033
                   CVE-2021-33034 CVE-2021-33909
====================================================================
1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

Security Fix(es):

* kernel: size_t-to-int conversion vulnerability in the filesystem layer
(CVE-2021-33909)

* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an
hci_chan (CVE-2021-33034)

* kernel: use-after-free in show_numa_stats function (CVE-2019-20934)

* kernel: mishandles invalid descriptors in
drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)

* kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c
(CVE-2021-33033)

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):

* [RHEL7.9.z] n_tty_open: "BUG: unable to handle kernel paging request"
(BZ#1872778)

* [ESXi][RHEL7.8]"qp_alloc_hypercall result = -20" / "Could not attach to
queue pair with -20" with vSphere Fault Tolerance enabled (BZ#1892237)

* [RHEL7.9][s390x][Regression] Sino Nomine swapgen IBM z/VM emulated DASD
with DIAG driver returns EOPNOTSUPP (BZ#1910395)

* False-positive hard lockup detected while processing the thread state
information (SysRq-T) (BZ#1912221)

* RHEL7.9 zstream - s390x LPAR with NVMe SSD will panic when it has 32 or
more IFL (pci) (BZ#1917943)

* The NMI watchdog detected a hard lockup while printing RCU CPU stall
warning messages to the serial console (BZ#1924688)

* nvme hangs when trying to allocate reserved tag (BZ#1926825)

* [REGRESSION] "call into AER handling regardless of severity" triggers
do_recovery() unnecessarily on correctable PCIe errors (BZ#1933663)

* Module nvme_core: A double free  of the kmalloc-512 cache between
nvme_trans_log_temperature() and nvme_get_log_page(). (BZ#1946793)

* sctp - SCTP_CMD_TIMER_START queues active timer kernel BUG at
kernel/timer.c:1000! (BZ#1953052)

* [Hyper-V][RHEL-7]When CONFIG_NET_POLL_CONTROLLER is set, mainline commit
2a7f8c3b1d3fee is needed (BZ#1953075)

* Kernel panic at cgroup_is_descendant (BZ#1957719)

* [Hyper-V][RHEL-7]Commits To Fix Kdump Failures (BZ#1957803)

* IGMPv2 JOIN packets incorrectly routed to loopback (BZ#1958339)

* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap
[7.9.z] (BZ#1960193)

* mlx4: Fix memory allocation in mlx4_buddy_init needed (BZ#1962406)

* incorrect assertion on pi_state->pi_mutex.wait_lock from
pi_state_update_owner() (BZ#1965495)

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/):

1824792 - CVE-2020-11668 kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c
1902788 - CVE-2019-20934 kernel: use-after-free in show_numa_stats function
1961300 - CVE-2021-33033 kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c
1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan
1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kernel-3.10.0-1160.36.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm
kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.36.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm
perf-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
kernel-3.10.0-1160.36.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm
kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.36.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm
perf-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
kernel-3.10.0-1160.36.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm
kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm

ppc64:
bpftool-3.10.0-1160.36.2.el7.ppc64.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debug-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-devel-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-headers-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-tools-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.ppc64.rpm
perf-3.10.0-1160.36.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
python-perf-3.10.0-1160.36.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm

ppc64le:
bpftool-3.10.0-1160.36.2.el7.ppc64le.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debug-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-devel-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-headers-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-tools-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.ppc64le.rpm
perf-3.10.0-1160.36.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
python-perf-3.10.0-1160.36.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm

s390x:
bpftool-3.10.0-1160.36.2.el7.s390x.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
kernel-3.10.0-1160.36.2.el7.s390x.rpm
kernel-debug-3.10.0-1160.36.2.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.s390x.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-1160.36.2.el7.s390x.rpm
kernel-devel-3.10.0-1160.36.2.el7.s390x.rpm
kernel-headers-3.10.0-1160.36.2.el7.s390x.rpm
kernel-kdump-3.10.0-1160.36.2.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
kernel-kdump-devel-3.10.0-1160.36.2.el7.s390x.rpm
perf-3.10.0-1160.36.2.el7.s390x.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm
python-perf-3.10.0-1160.36.2.el7.s390x.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.s390x.rpm

x86_64:
bpftool-3.10.0-1160.36.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm
perf-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.ppc64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64.rpm

ppc64le:
bpftool-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.ppc64le.rpm

x86_64:
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kernel-3.10.0-1160.36.2.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1160.36.2.el7.noarch.rpm
kernel-doc-3.10.0-1160.36.2.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1160.36.2.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-devel-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-headers-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1160.36.2.el7.x86_64.rpm
perf-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
bpftool-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1160.36.2.el7.x86_64.rpm
perf-debuginfo-3.10.0-1160.36.2.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1160.36.2.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/

7. References:

https://access.redhat.com/security/cve/CVE-2019-20934
https://access.redhat.com/security/cve/CVE-2020-11668
https://access.redhat.com/security/cve/CVE-2021-33033
https://access.redhat.com/security/cve/CVE-2021-33034
https://access.redhat.com/security/cve/CVE-2021-33909
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

8. Contact:

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

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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gDcx
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://listman.redhat.com/mailman/listinfo/rhsa-announce