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Public proof of conceptFix available

CVE-2020-14386

A public proof of concept exists; no exploitation attested.

  • Published2020-09-16
  • Fixed in5.8.8 · 5.4.64 · 4.19.150 · 4.14.201 · 4.9.239
  • WeaknessCWE-250 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.

Timeline

dates in UTC
  1. 2020-09-1613:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-14386?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-14386?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
5.x≥ 5.5, < 5.8.85.8.8
5.4≥ 4.20, < 5.4.645.4.64
4.x≥ 4.15, < 4.19.1504.19.150
4.x≥ 4.10, < 4.14.2014.14.201
4.x≥ 4.6, < 4.9.2394.9.239
5.9= 5.9.0no fix published
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
33.x= 33no fix published

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Linux linux kernel to 5.8.8 · 5.4.64 · 4.19.150 · 4.14.201 · 4.9.239

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedcgwalters/cve-2020-14386
PoC-in-GitHub

Sources

  • CNACVSS 3.16.7read 2026-10-23
  • NVDCVSS 3.17.8read 2026-10-23
  • NVDCVSS 2.07.2read 2026-10-23
  • CNAweakness (CWE)CWE-250, CWE-787read 2026-10-23
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score1.3 %2026-10-23
  • PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2020-09-16
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2020-14386?

A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.

Is CVE-2020-14386 actively exploited?

Active exploitation of CVE-2020-14386 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-14386?

CVE-2020-14386 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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