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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…

High8.0EPSS 0.74%
Published
Updated
Reserved
Assigned by
redhat

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.

Scores

CVSS scores of CVE-2018-1087, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.0High8.0CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.0High7.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.74% · top 45% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.0.

Weakness

Affected products

  • kernel · KVM

    • affected kernel 4.16
    • affected kernel 4.16-rc7
    • affected kernel 4.17-rc1
    • affected kernel 4.17-rc2
    • affected kernel 4.17-rc3

References (14)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .