CVE-2018-1087
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.74% probability · 55th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-250
- Affected
- linux/linux kernel · canonical/ubuntu linux · debian/debian linux · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux virtualization · redhat/enterprise linux workstation
- Source
- secalert@redhat.com
EPSS 0.7% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2018/05/08/5Mailing List
- http://www.securityfocus.com/bid/104127Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040862Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1318Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1345Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1347Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1348Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1355Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1524Third Party Advisory
- https://access.redhat.com/security/vulnerabilities/pop_ssThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1087Issue Tracking
- https://usn.ubuntu.com/3641-1/Third Party Advisory
- https://usn.ubuntu.com/3641-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4196Third Party Advisory
- http://www.openwall.com/lists/oss-security/2018/05/08/5Mailing List
- http://www.securityfocus.com/bid/104127Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040862Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1318Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1345Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1347Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1348Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1355Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1524Third Party Advisory
- https://access.redhat.com/security/vulnerabilities/pop_ssThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1087Issue Tracking
- https://usn.ubuntu.com/3641-1/Third Party Advisory
- https://usn.ubuntu.com/3641-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4196Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.