CVE-2020-27671: debian debian_linux
Vulnerability summary
CVE-2020-27671 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 27.6% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 17Timeline
- 22-10-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.34% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- xen< 4.14.0+80-gd101b417b7-1
- debian_linuxEOL10.0
Alpine1 product
- xen≥ 4.2.0, < 4.12.4-r0 | ≥ 4.2.0, < 4.13.2-r0 | ≥ 4.2.0, < 4.14.0-r2
Fedoraproject1 product
- fedoraEOL31
Opensuse1 product
- leapEOL15.1 | 15.2
Ubuntu1 product
- xenAll versions (No fix recorded)
Xen1 product
- xen≥ 4.2.0, ≤ 4.14.0
6 vendors · 7 products
References
12 links- lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
