SB2017030215 - Red Hat Enterprise Linux 7 update for kernel-rt
Published: March 2, 2017 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2016-8630)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the x86_decode_insn function in arch/x86/kvm/emulate.c due to NULL pointer dereference when KVM is enabled. A local attacker can cause the service to crash via a certain use of a ModR/M byte in an undefined instruction.
2) Use-after-free (CVE-ID: CVE-2016-8655)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the packet_setsockopt() and packet_set_ring() functions in net/packet/af_packet.c. A local user can execute arbitrary code.
3) Integer overflow (CVE-ID: CVE-2016-9083)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer overflow within the vfio_msi_enable() function in drivers/vfio/pci/vfio_pci_intrs.c, within the vfio_pci_ioctl() function in drivers/vfio/pci/vfio_pci.c. A local user can execute arbitrary code.
4) Integer overflow (CVE-ID: CVE-2016-9084)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer overflow within the vfio_msi_enable() function in drivers/vfio/pci/vfio_pci_intrs.c, within the vfio_pci_ioctl() function in drivers/vfio/pci/vfio_pci.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.