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redhatRedHatRHSA-2021:0003
HistoryJan 04, 2021 - 8:53 a.m.

(RHSA-2021:0003) Important: kernel security and bug fix update

2021-01-0408:53:43
access.redhat.com
214
kernel packages
linux operating system
buffer overflow
netfilter
bug fixes
rps cpumask
rngd
memory corruption
tlbflush
fips mode
vxlan
nfs share
security update

CVSS2

3.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:P/A:P

CVSS3

6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

EPSS

0

Percentile

5.1%

JSON

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

Security Fix(es):

  • kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

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):

  • avoid flush_backlog IPI for isolated CPUs by configuring RPS cpumask (BZ#1883314)

  • rngd consumes 100% cpu on rhel-8.3 system in fips mode (BZ#1886192)

  • RHEL8.1 - Random memory corruption may occur due to incorrect tlbflush (BZ#1899208)

  • fips mode boot is broken after adding extrng (BZ#1899584)

  • pmtu of 1280 for vxlan as bridge port won’t work (BZ#1902082)

  • rpc task loop with kworker spinning at 100% CPU for 10 minutes when umount an NFS 4.x share with sec=krb5 triggered by unmount of the NFS share (BZ#1907667)

OSVersionArchitecturePackageVersionFilename
RedHat8ppc64lekernel< 4.18.0-240.10.1.el8_3kernel-4.18.0-240.10.1.el8_3.ppc64le.rpm
RedHat8x86_64kernel-debug-core< 4.18.0-240.10.1.el8_3kernel-debug-core-4.18.0-240.10.1.el8_3.x86_64.rpm
RedHat8ppc64lekernel-devel< 4.18.0-240.10.1.el8_3kernel-devel-4.18.0-240.10.1.el8_3.ppc64le.rpm
RedHat8s390xkernel-core< 4.18.0-240.10.1.el8_3kernel-core-4.18.0-240.10.1.el8_3.s390x.rpm
RedHat8ppc64lekernel-debuginfo-common-ppc64le< 4.18.0-240.10.1.el8_3kernel-debuginfo-common-ppc64le-4.18.0-240.10.1.el8_3.ppc64le.rpm
RedHat8s390xkernel-zfcpdump-modules-extra< 4.18.0-240.10.1.el8_3kernel-zfcpdump-modules-extra-4.18.0-240.10.1.el8_3.s390x.rpm
RedHat8aarch64kernel-debug-core< 4.18.0-240.10.1.el8_3kernel-debug-core-4.18.0-240.10.1.el8_3.aarch64.rpm
RedHat8aarch64kernel-debug-modules< 4.18.0-240.10.1.el8_3kernel-debug-modules-4.18.0-240.10.1.el8_3.aarch64.rpm
RedHat8s390xpython3-perf-debuginfo< 4.18.0-240.10.1.el8_3python3-perf-debuginfo-4.18.0-240.10.1.el8_3.s390x.rpm
RedHat8s390xkernel-tools< 4.18.0-240.10.1.el8_3kernel-tools-4.18.0-240.10.1.el8_3.s390x.rpm
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CVSS2

3.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:P/A:P

CVSS3

6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

EPSS

0

Percentile

5.1%

JSON
Related for RHSA-2021:0003
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