CVE-2020-27674

Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 22 Oct 2020, 20:33
Last modified:04 Aug 2024, 16:18

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
v3.1 (nvd)
EPSS Score
0.07% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Oct 2020, 20:33
Published
Vulnerability first disclosed
04 Aug 2024, 16:18
Last Modified
Vulnerability information updated

Description

An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
  • v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.07%• Percentile: 22%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    31 | 32 | 33

  • xen•xen

    ≤ 4.14.0

References (7)