01 Record

CVE-2018-7540

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.43% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 35.6% of scored records. A rank, not a probability.
NVD base score: 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2018-02-27 19:00Z8 YR AGO

Last updated

2024-08-05 06:31Z2 YR AGO

Reserved

2018-02-27

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

2f4f4e4d79aca31730d0ce97fa2d66b463e1cc65851aba15135b00b38c8b2d2d

05 Affected products

VendorProductVersionsPlatforms

debiandebian_linuxNot specified—

redhatenterprise_linuxNot specified—

xenxenNot specified—

06 References

xenbits.xen.orghttps://xenbits.xen.org/xsa/advisory-252.htmlx_refsource_CONFIRM
security.gentoo.orgGLSA-201810-06https://security.gentoo.org/glsa/201810-06vendor-advisoryx_refsource_GENTOO
www.securitytracker.com1040773http://www.securitytracker.com/id/1040773vdb-entryx_refsource_SECTRACK
lists.debian.org[debian-lts-announce] 20181112 [SECURITY] [DLA 1577-1] xen security updatehttps://lists.debian.org/debian-lts-announce/2018/11/msg00013.htmlmailing-listx_refsource_MLIST
lists.debian.org[debian-lts-announce] 20180306 [SECURITY] [DLA 1300-1] xen security updatehttps://lists.debian.org/debian-lts-announce/2018/03/msg00003.htmlmailing-listx_refsource_MLIST
www.securityfocus.com103174http://www.securityfocus.com/bid/103174vdb-entryx_refsource_BID
www.debian.orgDSA-4131https://www.debian.org/security/2018/dsa-4131vendor-advisoryx_refsource_DEBIAN
support.citrix.comhttps://support.citrix.com/article/CTX232655x_refsource_CONFIRM
support.citrix.comhttps://support.citrix.com/article/CTX232096x_refsource_CONFIRM

01 Record index

CVE-2018-7540

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2018-7540

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References