CVE & CISA-KEV Catalog

CVE-2017-7518

MEDIUM
5.5
CVSS v3
NVD

Description

A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.

CWE-250CWE-755

How to fix

Remediation Available
linuxDebian
Fixed in:4.11.11-1CVE-2017-7518
Fixed in:4.11.11-1CVE-2017-7518
Fixed in:4.11.11-1CVE-2017-7518
Fixed in:4.11.11-1CVE-2017-7518
linuxUbuntu
Fixed in:3.13.0-157.207USN-3754-1
Fixed in:4.4.0-119.143USN-3619-1
linux-awsUbuntu
Fixed in:4.4.0-1016.16USN-3619-2
Fixed in:4.4.0-1054.63USN-3619-1
linux-image-3.13.0-157-genericUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-generic-lpaeUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-lowlatencyUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-powerpc-e500Ubuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-powerpc-e500mcUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-powerpc-smpUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-powerpc64-embUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-3.13.0-157-powerpc64-smpUbuntu
Fixed in:3.13.0-157.207USN-3754-1
linux-image-4.4.0-1016-awsUbuntu
Fixed in:4.4.0-1016.16USN-3619-2
linux-image-4.4.0-1020-kvmUbuntu
Fixed in:4.4.0-1020.25USN-3619-1
linux-image-4.4.0-1054-awsUbuntu
Fixed in:4.4.0-1054.63USN-3619-1
linux-image-4.4.0-1086-raspi2Ubuntu
Fixed in:4.4.0-1086.94USN-3619-1
linux-image-4.4.0-1088-snapdragonUbuntu
Fixed in:4.4.0-1088.93USN-3619-1
linux-image-4.4.0-119-genericUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-generic-lpaeUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-lowlatencyUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc-e500mcUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc-smpUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc64-embUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-image-4.4.0-119-powerpc64-smpUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
Fixed in:4.4.0-119.143USN-3619-1
linux-kvmUbuntu
Fixed in:4.4.0-1020.25USN-3619-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-119.143~14.04.1USN-3619-2
linux-raspi2Ubuntu
Fixed in:4.4.0-1086.94USN-3619-1
linux-snapdragonUbuntu
Fixed in:4.4.0-1088.93USN-3619-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityLow
AvailabilityLow

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploit Intelligence

0.70%probability of exploitation in 30 days
48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.