CVE-2020-25641

Advisory lineage Upstream: 0 Downstream: 30
Modified
Published: 06 Oct 2020, 13:33
Last modified:04 Aug 2024, 15:40

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability -0.04%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 Oct 2020, 13:33
Published
Vulnerability first disclosed
04 Aug 2024, 15:40
Last Modified
Vulnerability information updated

Description

A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-835•Loop with Unreachable Exit Condition ('Infinite Loop')

    The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Systems

  • canonical•ubuntu_linux

    18.04 | 20.04

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    ≤ 5.8.13 | 5.9.0 | 5.9.0:rc1 | 5.9.0:rc2 | 5.9.0:rc3 | 5.9.0:rc4 | 5.9.0:rc5 | 5.9.0:rc6

  • opensuse•leap

    15.1 | 15.2

  • redhat•enterprise_linux

    7.0 | 8.0

References (9)