7.8

CVE-2021-27379: debian debian_linux

Modified
AliasesSUSE-SU-2021:1250-1SUSE-SU-2021:1268-1UBUNTU-CVE-2021-27379
Published 18-02-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-27379 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 29.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.36%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 2
DSA-4888-1SUSE-SU-2021:1251-1SUSE-SU-2021:1252-1

Timeline

  1. 18-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.36% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse5 products
  • xen&distro=SUSE Linux Enterprise High Performance Computing 15-ESPOS< 4.10.4_24-3.56.1
  • xen&distro=SUSE Linux Enterprise High Performance Computing 15-LTSS< 4.10.4_24-3.56.1
  • xen&distro=SUSE Linux Enterprise Server 12 SP2-BCL< 4.7.6_14-43.76.1
  • xen&distro=SUSE Linux Enterprise Server for SAP Applications 15< 4.10.4_24-3.56.1
  • xen&distro=SUSE OpenStack Cloud 7< 4.7.6_14-43.76.1
Debian2 products
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product
  • xen≥ 3.2.0, < 4.12.0

4 vendors · 9 products

References

13 links
Show all 13 references