Home CVE Database CVE-2018-8897

CVE-2018-8897

Description

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer\'s Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.

Priority: HIGH
CVSS v3: 7.8
Publish Date: May 8, 2018
Related ID: --
CVSS v2: HIGH
Modified Date: May 9, 2018

Find out more about CVE-2018-8897 from the MITRE-CVE dictionary and NIST NVD


Products Affected

Login may be required to access defects or downloads.

Product Name Status Defect Fixed Downloads
Linux
Wind River Linux LTS 17 Fixed LIN10-3888
10.17.41.7 --
Wind River Linux 9 Fixed LIN9-6840
9.0.0.16 Wind River Linux 9.0.0.16
Wind River Linux 9.0.0.17
Wind River Linux 9.0.0.18
Wind River Linux 9.0.0.19
Wind River Linux 9.0.0.20
Wind River Linux 9.0.0.21
Wind River Linux 9.0.0.22
Wind River Linux 9.0.0.23
Wind River Linux 9.0.0.24
Wind River Linux 9.0.0.25
Wind River Linux 8 Fixed LIN8-9168
8.0.0.26 Wind River Linux 8.0.0.26
Wind River Linux 8.0.0.27
Wind River Linux 8.0.0.28
Wind River Linux 8.0.0.29
Wind River Linux 8.0.0.30
Wind River Linux 8.0.0.31
Wind River Linux 8.0.0.32
Wind River Linux 8.0.0.33
Wind River Linux LTS 18 Not Vulnerable -- -- --
Wind River Linux LTS 19 Not Vulnerable -- -- --
Wind River Linux CD release Not Vulnerable -- -- --
VxWorks
VxWorks 7 Fixed -- SR0600 --
VxWorks 6.9 Vulnerable -- -- --

Related Products

Product Name Status Defect Fixed Downloads
Linux 7 SCP Not Vulnerable -- -- --
Linux 7 CGP Not Vulnerable -- -- --

Comments

linux

Live chat
Online