CVE-2020-27784

Advisory lineage Upstream: 0 Downstream: 6
Modified
Published: 01 Sept 2022, 17:56
Last modified:04 Aug 2024, 16:25

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.08% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Sept 2022, 17:56
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated

Description

A vulnerability was found in the Linux kernel, where accessing a deallocated instance in printer_ioctl() printer_ioctl() tries to access of a printer_dev instance. However, use-after-free arises because it had been freed by gprinter_free().

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

EPSS Trends

Current EPSS score: 0.08%• Percentile: 23%

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

  • CWE-201•Insertion of Sensitive Information Into Sent Data

    The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.

Affected Systems

  • linux•linux_kernel

    ≥ 4.1, < 4.4.241 | ≥ 4.5, < 4.9.241 | ≥ 4.10, < 4.19.154 | ≥ 4.20, < 5.4.73 | ≥ 5.5, < 5.8.17 | ≥ 5.9.0, < 5.9.2

References (1)