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No exploitation reportedFix available

CVE-2020-15706

No exploitation reported by the sources we read.

  • Published2020-07-29
  • WeaknessCWE-362 · CWE-416

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

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

Timeline

dates in UTC
  1. 2020-07-2918:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 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-2020-15706?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-15706?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft windows 10
BranchAffectedFixed in
—all versionsno fix published
1607.x= 1607no fix published
1709.x= 1709no fix published
1803.x= 1803no fix published
1809.x= 1809no fix published
1903.x= 1903no fix published
1909.x= 1909no fix published
2004.x= 2004no fix published
Canonical ubuntu linux
BranchAffectedFixed in
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
20.4= 20.04no fix published
Microsoft windows server 2016
BranchAffectedFixed in
—all versionsno fix published
1903.x= 1903no fix published
1909.x= 1909no fix published
2004.x= 2004no fix published

11 more products in the sources.

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

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • fwupdRed Hat:rhel_eus:8.1::baseosall versions · fixed in 0:1.1.4-2.el8_1and 2 other packages
  • fwupdRed Hat:rhel_e4s:8.0::baseosall versions · fixed in 0:1.1.4-2.el8_0and 2 other packages
  • fwupdRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:1.1.4-7.el8_2and 2 other packages
  • fwupdateRed Hat:rhel_tus:7.4::serverall versions · fixed in 0:9-10.el7_4and 4 other packages
  • fwupdateRed Hat:rhel_eus:7.7::serverall versions · fixed in 0:12-6.el7_7and 4 other packages
  • fwupdateRed Hat:rhel_eus:7.7::computenodeall versions · fixed in 0:12-6.el7_7and 4 other packages
  • fwupdateRed Hat:rhel_eus:7.6::serverall versions · fixed in 0:12-6.el7_6and 4 other packages
  • fwupdateRed Hat:rhel_eus:7.6::computenodeall versions · fixed in 0:12-6.el7_6and 4 other packages

112 more package ranges on OSV.dev

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.16.4known since 2026-10-23
  • NVDCVSS 3.16.4read 2026-10-23
  • NVDCVSS 2.04.4read 2026-10-23
  • CNAweakness (CWE)CWE-362known since 2026-10-23
  • NVDweakness (CWE)CWE-362, CWE-416read 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-11-03
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2020-07-29
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-gmqm-wgp3-r69q

Frequently asked questions

What is CVE-2020-15706?

GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.

Is CVE-2020-15706 actively exploited?

Active exploitation of CVE-2020-15706 has not been confirmed. Its EPSS score was 1.0% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-15706?

CVE-2020-15706 has a CVSS v3 base score of 6.4 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

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