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.
Key facts
- CVSS score
- 6.4 (v3.1)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-362
- EPSS score
- 1.0% (61th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2020-7692)
- Published
- July 29, 2020
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2020-7692 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.
View on the EU Vulnerability DatabaseAffected products
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- canonical / ubuntu linux
- debian / debian linux
- gnu / grub2
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 10
- microsoft / windows 8.1
- microsoft / windows rt 8.1
- microsoft / windows server 2012
- microsoft / windows server 2012
- microsoft / windows server 2016
- microsoft / windows server 2016
- microsoft / windows server 2016
- microsoft / windows server 2016
- microsoft / windows server 2019
- opensuse / leap
- opensuse / leap
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux atomic host
- redhat / openshift container platform
- suse / suse linux enterprise server
- suse / suse linux enterprise server
- suse / suse linux enterprise server
Certified products that may be affected
29 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
- SUSE Linux Enterprise Server Version 15 SP2 - SUSE LLC - Common Criteria BSI-DSZ-CC-1168-2021 - active
- Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical
See all 29 in the Security Certifications Explorer.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html(Broken Link, Mailing List, Third Party Advisory)
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html(Broken Link, Mailing List, Third Party Advisory)
- http://ubuntu.com/security/notices/USN-4432-1(Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2020/07/29/3(Mailing List, Third Party Advisory)
- https://access.redhat.com/security/vulnerabilities/grub2bootloader(Third Party Advisory)
- https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html(Issue Tracking, Vendor Advisory)
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011(Patch, Third Party Advisory, Vendor Advisory)
- https://security.gentoo.org/glsa/202104-05(Third Party Advisory)
- https://security.netapp.com/advisory/ntap-20200731-0008/(Third Party Advisory)
- https://usn.ubuntu.com/4432-1/(Third Party Advisory)
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass(Third Party Advisory)
- https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot(Third Party Advisory)
- https://www.debian.org/security/2020/dsa-4735(Third Party Advisory)
- https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/(Third Party Advisory)
- https://www.openwall.com/lists/oss-security/2020/07/29/3(Mailing List, Third Party Advisory)
- https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/(Third Party Advisory)
- https://www.suse.com/support/kb/doc/?id=000019673(Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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