7.8

CVE-2020-14381: linux linux_kernel Use After Free

Modified
AliasesUBUNTU-CVE-2020-14381DEBIAN-CVE-2020-14381
Published 03-12-2020Last modified 25-02-2026

Vulnerability summary

CVE-2020-14381 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.83% chance of exploitation in the next 30 days, higher than 57.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, 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 (CVE.org)
EPSS score
0.83%
0%100%
Low · 0.00 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 23 · Related 21
OPENSUSE-SU-2020:1655-1RHSA-2020:4431RHSA-2020:4609SUSE-SU-2020:2904-1SUSE-SU-2020:2905-1SUSE-SU-2020:2906-1

Timeline

  1. 03-12-2020
    PublishedVulnerability first disclosed.
  2. 25-02-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel’s futex implementation. This flaw allows a local attacker to corrupt system memory or escalate their privileges when creating a futex on a filesystem that is about to be unmounted. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.83%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.83% 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.

Ubuntu37 products
  • linuxAll versions (No fix recorded) | < 4.4.0-179.209 | < 4.15.0-99.100
  • linux-aws< 4.4.0-1067.71 | < 4.4.0-1107.118 | < 4.15.0-1066.70
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.3All versions (No fix recorded)
  • linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
Debian1 product
  • linux< 5.5.13-1
Linux1 product
  • linux_kernel< 5.6 | 5.6 | 5.6:rc1 | 5.6:rc2 | 5.6:rc3 | 5.6:rc4 | 5.6:rc5

3 vendors · 39 products

References

7 links