CVE-2020-16119

Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 14 Jan 2021, 01:10
Last modified:16 Sept 2024, 18:19

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.09% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

14 Jan 2021, 01:10
Published
Vulnerability first disclosed
16 Sept 2024, 18:19
Last Modified
Vulnerability information updated

Description

Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.09%• Percentile: 25%

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

  • canonical•linux kernel

    ≥ 5.4 kernel, < 5.4.0-51.56 | ≥ 5.3 kernel, < 5.3.0-68.63 | ≥ 4.15 kernel, < 4.15.0-121.123 | ≥ 4.4 kernel, < 4.4.0-193.224 | ≥ 3.13 kernel, < 3.13.0.182.191 | ≥ 3.2 kernel, < 3.2.0-149.196

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 18.04 | 20.04

  • debian•debian_linux

    9.0 | 11.0

  • linux•linux_kernel

    na

References (12)