Vulnerability Details : CVE-2020-16119

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.

Vulnerability category: Memory Corruption

Published 2021-01-14 01:15:13

Updated 2022-01-01 18:13:02

Source Canonical Ltd.

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-16119

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-16119

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
4.6	MEDIUM	AV:L/AC:L/Au:N/C:P/I:P/A:P	3.9	6.4	nvd@nist.gov
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	nvd@nist.gov
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
6.3	MEDIUM	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H	1.0	5.2	security@ubuntu.com
Attack Vector: Local Attack Complexity: High Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

CWE ids for CVE-2020-16119

CWE-416 Use After Free

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
Assigned by:
- nvd@nist.gov (Primary)
- security@ubuntu.com (Secondary)

References for CVE-2020-16119

https://ubuntu.com/USN-4578-1

USN-4578-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://ubuntu.com/USN-4576-1

USN-4576-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://ubuntu.com/USN-4580-1

USN-4580-1: Linux kernel vulnerability | Ubuntu security notices | Ubuntu
Third Party Advisory
https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza@canonical.com/T/

[PATCH 0/2] net: dccp: fix structure use-after-free
Patch;Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

[SECURITY] [DLA 2843-1] linux security update
Third Party Advisory

CVEs referencing this url
https://ubuntu.com/USN-4579-1

USN-4579-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory
https://www.debian.org/security/2021/dsa-4978

Debian -- Security Information -- DSA-4978-1 linux
Third Party Advisory

CVEs referencing this url
https://security.netapp.com/advisory/ntap-20210304-0006/

CVE-2020-16119 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695

~ubuntu-kernel/ubuntu/+source/linux/+git/focal - [no description]
Patch;Third Party Advisory
https://ubuntu.com/USN-4577-1

USN-4577-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu
Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html

[SECURITY] [DLA 2785-1] linux-4.19 security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://launchpad.net/bugs/1883840

Bug #1883840 “Double free in DCCP module causing kernel panic” : Bugs : linux package : Ubuntu
Issue Tracking;Patch;Third Party Advisory

Products affected by CVE-2020-16119

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel » Version: N/A
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 12.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 14.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 20.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Matching versions