CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
10.1%
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
The timeout handling in the libfc.ko kernel module did not work correctly. This was happening during certain steps of the Fibre Channel login procedure, when the timeout handling was not synchronized with the state of a partially offloaded Fibre Channel over Ethernet (FCoE) in the lower-level driver. Consequently, the offloaded FCoE state was incorrect, which led to I/O timeout errors until the SCSI error recovery issued a host reset. This update fixes the bug by improving the libfc.ko error handling during the fabric login. As a result, the fabric login errors are addressed in time, without the I/O timeouts in the described scenario. (BZ#1655042)
Symmetric Multi-Processing (SMP) or Non-Uniform Memory Access (NUMA) systems in some cases experienced deadlocks during a task migration and task wakeup operations. Consequently, the systems terminated unexpectedly with the following message:
NMI watchdog: Watchdog detected hard LOCKUP on <some CPU #>
This update fixes the bug by queueing the stopper thread to run after locks are released. As a result, the deadlocks and the system crashes no longer occur in the described scenario. (BZ#1667326)
Users of kernel are advised to upgrade to these updated packages, which fix these bugs.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
RedHat | 7 | s390x | kernel-kdump-devel | <Β 3.10.0-693.44.1.el7 | kernel-kdump-devel-3.10.0-693.44.1.el7.s390x.rpm |
RedHat | 7 | x86_64 | perf | <Β 3.10.0-693.44.1.el7 | perf-3.10.0-693.44.1.el7.x86_64.rpm |
RedHat | 7 | ppc64 | perf-debuginfo | <Β 3.10.0-693.44.1.el7 | perf-debuginfo-3.10.0-693.44.1.el7.ppc64.rpm |
RedHat | 7 | x86_64 | kernel-devel | <Β 3.10.0-693.44.1.el7 | kernel-devel-3.10.0-693.44.1.el7.x86_64.rpm |
RedHat | 7 | x86_64 | kernel-debug-devel | <Β 3.10.0-693.44.1.el7 | kernel-debug-devel-3.10.0-693.44.1.el7.x86_64.rpm |
RedHat | 7 | ppc64 | kernel-bootwrapper | <Β 3.10.0-693.44.1.el7 | kernel-bootwrapper-3.10.0-693.44.1.el7.ppc64.rpm |
RedHat | 7 | ppc64le | kernel-debug | <Β 3.10.0-693.44.1.el7 | kernel-debug-3.10.0-693.44.1.el7.ppc64le.rpm |
RedHat | 7 | ppc64le | kernel-tools-libs-devel | <Β 3.10.0-693.44.1.el7 | kernel-tools-libs-devel-3.10.0-693.44.1.el7.ppc64le.rpm |
RedHat | 7 | ppc64le | perf-debuginfo | <Β 3.10.0-693.44.1.el7 | perf-debuginfo-3.10.0-693.44.1.el7.ppc64le.rpm |
RedHat | 7 | s390x | kernel | <Β 3.10.0-693.44.1.el7 | kernel-3.10.0-693.44.1.el7.s390x.rpm |
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
10.1%