Use After Free in Linux Kernel
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 class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linux Kernel
- Canonical Linux Kernel — versions 5.4 kernel, 5.3 kernel, 4.15 kernel
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 9.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
- ARPSyndicate/cvemon
- HadarManor/Public-Vulnerabilities
- kdn111/linux-kernel-exploitation
- khanhdn111/linux-kernel-exploitation
- khanhdz-06/linux-kernel-exploitation
- khanhdz191/linux-kernel-exploitation
- khanhhdz/linux-kernel-exploitation
- khanhhdz06/linux-kernel-exploitation
- khanhnd123/linux-kernel-exploitation
- khnhdz/linux-kernel-exploitation
References
- launchpad.net/bugs/1883840 (vendor-advisory, Patch, Third Party Advisory, Issue Tracking)
- ubuntu.com/USN-4576-1 (vendor-advisory, Third Party Advisory)
- ubuntu.com/USN-4577-1 (vendor-advisory, Third Party Advisory)
- ubuntu.com/USN-4578-1 (vendor-advisory, Third Party Advisory)
- ubuntu.com/USN-4579-1 (vendor-advisory, Third Party Advisory)
- ubuntu.com/USN-4580-1 (vendor-advisory, Third Party Advisory)
- lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza@canonical.com/T/
- git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/ (vendor-advisory, Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210304-0006/ (Third Party Advisory)
- www.debian.org/security/2021/dsa-4978 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-16119?
- CVE-2020-16119 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 6.3/10. Published 2021-01-14.
- How severe is CVE-2020-16119?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2020-16119 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.