A kernel security and bug fix update has been released for Red Hat Enterprise Linux 7.
RHSA-2021:2725-01: Important: kernel security and bug fix update
=====================================================================
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 . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
