7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
7.8%
CentOS Errata and Security Advisory CESA-2017:0386
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to a null pointer dereference flaw. It could occur on x86 platform, when emulating an undefined instruction. An attacker could use this flaw to crash the host kernel resulting in DoS. (CVE-2016-8630, Important)
A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets implementation in the Linux kernel networking subsystem handled synchronization while creating the TPACKET_V3 ring buffer. A local user able to open a raw packet socket (requires the CAP_NET_RAW capability) could use this flaw to elevate their privileges on the system. (CVE-2016-8655, Important)
A flaw was discovered in the Linux kernel’s implementation of VFIO. An attacker issuing an ioctl can create a situation where memory is corrupted and modify memory outside of the expected area. This may overwrite kernel memory and subvert kernel execution. (CVE-2016-9083, Important)
The use of a kzalloc with an integer multiplication allowed an integer overflow condition to be reached in vfio_pci_intrs.c. This combined with CVE-2016-9083 may allow an attacker to craft an attack and use unallocated memory, potentially crashing the machine. (CVE-2016-9084, Moderate)
Red Hat would like to thank Philip Pettersson for reporting CVE-2016-8655.
Additional Changes:
Space precludes documenting all of the bug fixes and enhancements included in this advisory. To see the complete list of bug fixes and enhancements, refer to the following KnowledgeBase article: https://access.redhat.com/articles/2940041.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2017-March/084486.html
Affected packages:
kernel
kernel-abi-whitelists
kernel-debug
kernel-debug-devel
kernel-devel
kernel-doc
kernel-headers
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python-perf
Upstream details at:
https://access.redhat.com/errata/RHSA-2017:0386
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 7 | x86_64 | kernel | < 3.10.0-514.10.2.el7 | kernel-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | noarch | kernel-abi-whitelists | < 3.10.0-514.10.2.el7 | kernel-abi-whitelists-3.10.0-514.10.2.el7.noarch.rpm |
CentOS | 7 | x86_64 | kernel-debug | < 3.10.0-514.10.2.el7 | kernel-debug-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | x86_64 | kernel-debug-devel | < 3.10.0-514.10.2.el7 | kernel-debug-devel-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | x86_64 | kernel-devel | < 3.10.0-514.10.2.el7 | kernel-devel-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | noarch | kernel-doc | < 3.10.0-514.10.2.el7 | kernel-doc-3.10.0-514.10.2.el7.noarch.rpm |
CentOS | 7 | x86_64 | kernel-headers | < 3.10.0-514.10.2.el7 | kernel-headers-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | x86_64 | kernel-tools | < 3.10.0-514.10.2.el7 | kernel-tools-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | x86_64 | kernel-tools-libs | < 3.10.0-514.10.2.el7 | kernel-tools-libs-3.10.0-514.10.2.el7.x86_64.rpm |
CentOS | 7 | x86_64 | kernel-tools-libs-devel | < 3.10.0-514.10.2.el7 | kernel-tools-libs-devel-3.10.0-514.10.2.el7.x86_64.rpm |
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
7.8%