7.8

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

Modified
AliasesUBUNTU-CVE-2020-16119USN-4580-1DEBIAN-CVE-2020-16119
Published 14-01-2021Last modified 16-09-2024

Vulnerability summary

CVE-2020-16119 is a high (CVSS 7.8) Use After Free vulnerability in canonical linux kernel. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.43%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 11
DLA-2785-1DLA-2843-1DSA-4978-1LSN-0072-1MGASA-2021-0459MGASA-2021-0460

Timeline

  1. 14-01-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability 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

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.42% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard82 products
  • hyperv-daemons-6.18All versions (No fix recorded)
  • hyperv-daemons-genericAll versions (No fix recorded)
  • linux-aws-6.12< 6.12.65-r0 | All versions (No fix recorded)
  • linux-aws-6.12-boot-installedAll versions (No fix recorded)
  • linux-aws-6.12-fips-boot-installedAll versions (No fix recorded)
Ubuntu47 products
  • linux< 4.4.0-193.224 | < 4.15.0-121.123 | < 5.4.0-51.56 | < 3.13.0-182.233
  • linux-aws< 4.4.0-1081.85 | < 4.4.0-1117.131 | < 4.15.0-1086.91 | < 5.4.0-1028.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-5.4< 5.4.0-1028.29~18.04.1
Canonical2 products
  • 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
  • ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04 | 20.04
Debian2 products
Linux1 product

5 vendors · 134 products

References

22 links
Show all 22 references