CVE-2018-10853

Status: ModifiedHigh (7.8)—
A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.
CVSS

Version: 3.0
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base score: 7.8
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.47%
Percentile among all scored CVEs: 39
Score date: 10/9/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (3)

Canonical — Ubuntu Linux Debian — Debian Linux Linux — Linux Kernel
CWEs

CWE-250
CWE-269
References

Raw JSON (NVD)

Show
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      "value": "A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest."
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      "value": "Se ha encontrado un error en la forma en la que el hipervisor KVM del kernel de Linux en versiones anteriores a la 4.18 emulaba instrucciones como sgdt/sidt/fxsave/fxrstor. No comprobó el nivel de privilegios actual (CPL) al emular instrucciones sin privilegios. Un usuario invitado o un proceso sin privilegios podrían emplear este error para escalar sus privilegios en el invitado."
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  "lastModified": "2026-06-17T01:34:45.953",
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