Description
A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Grub | All grub2 versions before 2.06 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | grub2 | 2.04-9 | — |
| Debian 13 | grub2 | 2.04-9 | — |
| Debian 12 | grub2 | 2.04-9 | — |
| Debian 10 | grub2 | 2.02+dfsg1-20+deb10u1 | DSA-4735-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | grub2 | 2.04-1ubuntu26.1 | USN-4432-1 |
| Ubuntu 20.04 LTS | grub2-signed | 1.142.3 | USN-4432-1 |
| Ubuntu 20.04 LTS | grub2-unsigned | 2.04-1ubuntu47.4 | — |
| Ubuntu 18.04 LTS | grub2 | 2.02-2ubuntu8.16 | USN-4432-1 |
| Ubuntu 18.04 LTS | grub2-signed | 1.93.18 | USN-4432-1 |
| Ubuntu 18.04 LTS | grub2-unsigned | 2.04-1ubuntu47.4 | — |
| Ubuntu 16.04 LTS | grub2 | 2.02~beta2-36ubuntu3.26 | USN-4432-1 |
| Ubuntu 16.04 LTS | grub2-signed | 1.66.26 | USN-4432-1 |
| Ubuntu 16.04 LTS | grub2-unsigned | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | grub2 | 2.02~beta2-9ubuntu1.20 | USN-4432-1 |
| Ubuntu Pro 14.04 LTS | grub2-signed | 1.34.22 | USN-4432-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | fwupd | 1.1.4-7.el8_2 | RHSA-2020:3216 |
| RHEL 8 | grub2 +18 | 1:2.02-87.el8_2 | RHSA-2020:3216 |
| RHEL 8 | shim +3 | 15-14.el8_2 | RHSA-2020:3216 |
| RHEL 8 | shim-unsigned-x64 | 15-7.el8 | RHSA-2020:3216 |
| RHEL 7 | fwupdate +3 | 12-6.el7_8 | RHSA-2020:3217 |
| RHEL 7 | grub2 +18 | 1:2.02-0.86.el7_8 | RHSA-2020:3217 |
| RHEL 7 | mokutil +3 | 15-7.el7_8 | RHSA-2020:3217 |
| RHEL 7 | redhat-virtualization-host +1 | 4.3.11-20200922.0.el7_9 | RHSA-2020:4115 |
| RHEL 7 | shim +2 | 15-7.el7_9 | RHSA-2020:3217 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | redhat-virtualization-host +1 | 4.4.2-20200930.0.el8_2 | RHSA-2020:4172 |
| RHEL 8.1 EUS | fwupd | 1.1.4-2.el8_1 | RHSA-2020:3223 |
| RHEL 8.1 EUS | grub2 +18 | 1:2.02-87.el8_1 | RHSA-2020:3223 |
| RHEL 8.1 EUS | shim +3 | 15-14.el8_1 | RHSA-2020:3223 |
| RHEL 8.1 EUS | shim-unsigned-x64 | 15-7.el8 | RHSA-2020:3223 |
| RHEL 8.0 E4S | fwupd | 1.1.4-2.el8_0 | RHSA-2020:3227 |
| RHEL 8.0 E4S | grub2 +16 | 1:2.02-87.el8_0 | RHSA-2020:3227 |
| RHEL 8.0 E4S | shim +2 | 15-14.el8_0 | RHSA-2020:3227 |
| RHEL 7.7 EUS | fwupdate +3 | 12-6.el7_7 | RHSA-2020:3274 |
| RHEL 7.7 EUS | grub2 +18 | 1:2.02-0.86.el7_7 | RHSA-2020:3274 |
| RHEL 7.7 EUS | mokutil +3 | 15-8.el7_7 | RHSA-2020:3274 |
| RHEL 7.7 EUS | shim +2 | 15-8.el7 | RHSA-2020:3274 |
| RHEL 7.6 EUS | fwupdate +3 | 12-6.el7_6 | RHSA-2020:3271 |
| RHEL 7.6 EUS | grub2 +18 | 1:2.02-0.86.el7_6 | RHSA-2020:3271 |
| RHEL 7.6 EUS | mokutil +3 | 15-8.el7_6 | RHSA-2020:3271 |
| RHEL 7.6 EUS | shim +2 | 15-8.el7 | RHSA-2020:3271 |
| RHEL 7.4 TUS | fwupdate +3 | 9-10.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 TUS | grub2 +16 | 1:2.02-0.86.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 TUS | mokutil +3 | 15-8.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 TUS | shim +2 | 15-8.el7 | RHSA-2020:3275 |
| RHEL 7.4 E4S | fwupdate +3 | 9-10.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 E4S | grub2 +17 | 1:2.02-0.86.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 E4S | mokutil +3 | 15-8.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 E4S | shim +2 | 15-8.el7 | RHSA-2020:3275 |
| RHEL 7.4 AUS | fwupdate +3 | 9-10.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 AUS | grub2 +16 | 1:2.02-0.86.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 AUS | mokutil +3 | 15-8.el7_4 | RHSA-2020:3275 |
| RHEL 7.4 AUS | shim +2 | 15-8.el7 | RHSA-2020:3275 |
| RHEL 7.3 TUS | grub2 +16 | 1:2.02-0.86.el7 | RHSA-2020:3276 |
| RHEL 7.3 TUS | mokutil +1 | 15-8.el7_3 | RHSA-2020:3276 |
| RHEL 7.3 TUS | shim +2 | 15-8.el7 | RHSA-2020:3276 |
| RHEL 7.3 E4S | grub2 +17 | 1:2.02-0.86.el7 | RHSA-2020:3276 |
| RHEL 7.3 E4S | mokutil +1 | 15-8.el7_3 | RHSA-2020:3276 |
| RHEL 7.3 E4S | shim +2 | 15-8.el7 | RHSA-2020:3276 |
| RHEL 7.3 AUS | grub2 +16 | 1:2.02-0.86.el7 | RHSA-2020:3276 |
| RHEL 7.3 AUS | mokutil +1 | 15-8.el7_3 | RHSA-2020:3276 |
| RHEL 7.3 AUS | shim +2 | 15-8.el7 | RHSA-2020:3276 |
| RHEL 7.2 AUS | grub2 +16 | 1:2.02-0.86.el7_2 | RHSA-2020:3273 |
| RHEL 7.2 AUS | mokutil +1 | 15-8.el7_2 | RHSA-2020:3273 |
| RHEL 7.2 AUS | shim +2 | 15-8.el7 | RHSA-2020:3273 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | grub2 | 2.04-9.7.1 | SUSE-SU-2020:2074-1 |
| SLES 15 SP2 | shim | 15+git47-3.8.1 | SUSE-SU-2020:2629-1 |
| SLES 15 SP1 | grub2 | 2.02-26.25.1 | SUSE-SU-2020:2077-1 |
| SLES 15 SP1 | shim | 15+git47-3.8.1 | SUSE-SU-2020:2629-1 |
| SLES 15 | grub2 | 2.02-19.48.1 | SUSE-SU-2020:2073-1 |
| SLES 12 SP5 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SLES 12 SP5 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SLES 12 SP4 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SLES 12 SP4 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SLES 12 SP3 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SLES 12 SP2 | grub2 | 2.02~beta2-115.49.1 | SUSE-SU-2020:2076-1 |
| SLES 12 SP2 | shim | 15+git47-22.8.1 | SUSE-SU-2020:2628-1 |
| SLES 11 SP4 | grub2 | 2.00-0.66.15.1 | SUSE-SU-2020:14440-1 |
| SLES 11 SP4 | shim | 15+git47-12.5.1 | SUSE-SU-2020:14490-1 |
| SLES for SAP 15 | grub2 | 2.02-19.48.1 | SUSE-SU-2020:2073-1 |
| SLES for SAP 15 | shim | 15+git47-7.15.1 | SUSE-SU-2020:2626-1 |
| SLES for SAP 12 SP5 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SLES for SAP 12 SP5 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SLES for SAP 12 SP4 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SLES for SAP 12 SP4 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SLES for SAP 12 SP3 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SLES for SAP 12 SP3 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SLES for SAP 12 SP2 | grub2 | 2.02~beta2-115.49.1 | SUSE-SU-2020:2076-1 |
| SLES for SAP 12 SP2 | shim | 15+git47-22.8.1 | SUSE-SU-2020:2628-1 |
| SLE HPC 15 | grub2 | 2.02-19.48.1 | SUSE-SU-2020:2073-1 |
| SLE HPC 15 | shim | 15+git47-7.15.1 | SUSE-SU-2020:2626-1 |
| SUSE OpenStack Cloud Crowbar 9 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SUSE OpenStack Cloud Crowbar 9 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SUSE OpenStack Cloud Crowbar 8 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SUSE OpenStack Cloud Crowbar 8 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SUSE OpenStack Cloud 9 | grub2 | 2.02-12.31.1 | SUSE-SU-2020:2078-1 |
| SUSE OpenStack Cloud 9 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SUSE OpenStack Cloud 8 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SUSE OpenStack Cloud 8 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SUSE OpenStack Cloud 7 | grub2 | 2.02~beta2-115.49.1 | SUSE-SU-2020:2076-1 |
| SUSE OpenStack Cloud 7 | shim | 15+git47-22.8.1 | SUSE-SU-2020:2628-1 |
| SUSE HPE Helion OpenStack 8 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SUSE HPE Helion OpenStack 8 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
| SUSE Enterprise Storage 5 | grub2 | 2.02-4.53.1 | SUSE-SU-2020:2079-1 |
| SUSE Enterprise Storage 5 | shim | 15+git47-25.11.1 | SUSE-SU-2020:2627-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | grub2 | 2.06-7.1 | openSUSE-SU-2024:10824-1 |
| openSUSE Leap 15.2 | grub2 | 2.04-lp152.7.3.4 | openSUSE-SU-2020:1169-1 |
| openSUSE Leap 15.1 | grub2 | 2.02-lp151.21.21.4 | openSUSE-SU-2020:1168-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | grub | 2.06-r0 | — |
| Alpine v3.23 | grub | 2.06-r0 | — |
| Alpine v3.22 | grub | 2.06-r0 | — |
| Alpine v3.21 | grub | 2.06-r0 | — |
| Alpine v3.20 | grub | 2.06-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | grub | 2.06-r0 | — |
| Alpine v3.18 | grub | 2.06-r0 | — |
| Alpine v3.17 | grub | 2.06-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | grub2 | 2.06~rc1-7 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | grub2-pc +15 | 1:2.02-82.0.2.el8_2.1 | ELSA-2020-5786 |
| Oracle Linux 7 | grub2 +12 | 1:2.02-0.81.0.3.el7 | ELSA-2020-5790, ELSA-2020-5782 |
| Oracle Linux 7 | grub2-efi-aa64 +1 | 1:2.02-0.81.0.4.el7 | ELSA-2020-5790 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
eclypsium/BootHole ★ 69 · Jul 29, 2020
BootHole vulnerability (CVE-2020-10713). detection script, links and other mitigation related materials
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 33
- USN-4432-1 grub2, grub2-signed vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2020:4172 Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:4115 Red Hat Security Advisory: redhat-release-virtualization-host and redhat-virtualization-host security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3276 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3274 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3275 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3271 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3273 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3227 Red Hat Security Advisory: grub2 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3223 Red Hat Security Advisory: grub2 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3217 Red Hat Security Advisory: grub2 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2020:3216 Red Hat Security Advisory: grub2 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- WID-SEC-2022-0553 Grub2: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Mar 17, 2026
- DSA-4735-1 grub2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:2079-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2076-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2628-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14490-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1168-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2627-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2077-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2078-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1169-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2626-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14440-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10824-1 grub2-2.06-7.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2074-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2629-1 Security update for shim SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2073-1 Security update for grub2 SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-21-336-06 Hitachi Energy APM Edge CISA ICS & IT advisories · Dec 2, 2021
- ELSA-2020-5782 Important: grub2 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 29, 2020
- ELSA-2020-5790 Important: grub2 security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 29, 2020
- ELSA-2020-5786 Important: grub2 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 29, 2020
References
- DSA-4735 vendor-advisory
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1825243
- VU#174059 third-party-advisory
- https://security.netapp.com/advisory/ntap-20200731-0008/
- USN-4432-1 vendor-advisory
- 20200804 GRUB2 Arbitrary Code Execution Vulnerability vendor-advisory
- openSUSE-SU-2020:1169 vendor-advisory
- openSUSE-SU-2020:1168 vendor-advisory
- https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
- https://kb.vmware.com/s/article/80181
- https://cve.openeuler.org/#/CVEInfo/CVE-2020-10713
- GLSA-202104-05 vendor-advisory