CVE-2020-16119: DCCP CCID structure use-after-free

Published Jan 14, 2021
·
Updated

Last updated 12 October 2026

Other sources

Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccpshctxccid 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.

— MITRE

Affected Software

9 affected componentsFixes available
Linux Linux kernel
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Debian Debian Linux=9.0
Debian Debian Linux=11.0
debian/linux
6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-17.2.13-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1
  2. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.4.0-51.56
  3. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.3.0-68.63
  4. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 4.15.0-121.123
  5. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 4.4.0-193.224
  6. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 3.13.0.182.191
  7. Upgrade

    Upgrade Ubuntu Linux kernel to a version that resolves this vulnerability.

    Fixed in 3.2.0-149.196
  8. Configuration

    Add the following lines to /etc/modprobe.d/blacklist-dccp.conf: alias net-pf-10-proto-0-type-6 off; alias net-pf-10-proto-33-type-6 off; alias net-pf-2-proto-0-type-6 off; alias net-pf-2-proto-33-type-6 off.

    Linux kernel DCCP module autoloading DCCP protocol autoloading aliases = off

Event History

Oct 13, 2020
CVE Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
Jan 14, 2021
CVE Published
via MITRE·01:10 AM
Data Sourced
via MITRE·01:10 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·01:15 AM
RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2020-16119?

CVE-2020-16119 is considered a high-severity vulnerability that can be exploited by local attackers.

2

How do I fix CVE-2020-16119?

To fix CVE-2020-16119, upgrade to a fixed version of the Linux kernel, such as 5.4.0-51.56 or newer.

3

Which systems are affected by CVE-2020-16119?

CVE-2020-16119 affects various Linux distributions, including specific versions of Ubuntu and Debian.

4

Can CVE-2020-16119 be exploited remotely?

No, CVE-2020-16119 requires local access to be exploited.

5

What type of vulnerability is CVE-2020-16119?

CVE-2020-16119 is a use-after-free vulnerability within the Linux kernel.

Company

Resources

Contact

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