Back
CVE-2020-27671
An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption),…
High7.8EPSS 0.34%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.
Timeline
ID reserved
By mitre
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.34% · top 72% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (8)
- http://xenbits.xen.org/xsa/advisory-346.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://xenbits.xen.org/xsa/advisory-346.html (opens in a new tab)x_refsource_MISCx_transferred
- openSUSE-SU-2020:1783 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2020:1844 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-202011-06 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- FEDORA-2020-6dd36a716c (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- DSA-4804 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [oss-security] 20210119 Xen Security Advisory 346 v3 (CVE-2020-27671) - undue deferral of IOMMU TLB flushes (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-27671)Record last updated .