CVE-2020-25656

Advisory lineage Upstream: 0 Downstream: 33
Modified
Published: 02 Dec 2020, 00:00
Last modified:04 Aug 2024, 15:40

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
4.1 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

02 Dec 2020, 00:00
Published
Vulnerability first disclosed
04 Aug 2024, 15:40
Last Modified
Vulnerability information updated

Description

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.1CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
  • v2.0•LOW•Score: 1.9AV:L/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    < 5.10 | 5.10:rc1

  • redhat•enterprise_linux

    7.0 | 8.0

  • starwindsoftware•starwind_virtual_san

    v8:build12533 | v8:build12658 | v8:build12859 | v8:build13170 | v8:build13586 | v8:build13861

References (6)