CVE-2020-25647: fedoraproject fedora Out-of-bounds Write
Vulnerability summary
CVE-2020-25647 is a high (CVSS 7.6) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 24 · Related 9Timeline
- 03-03-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.6HighCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.6HighCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS trend
Probability
0.79%
Chance of exploitation in the next 30 days
Percentile
56%
Versus all other CVEs
30-day change
0.00 pp
From 0.79% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat5 products
- enterprise_linuxEOL7.0 | 8.0
- enterprise_linux_server_aus7.2 | 7.3 | 7.4 | 7.6 | 7.7 | 8.2
- enterprise_linux_server_eus7.6 | 7.7 | 8.1
- enterprise_linux_server_tus7.4 | 7.6 | 7.7 | 8.2
- enterprise_linux_workstation7.0
Alpine1 product
- grub< 2.06-r0
Debian1 product
- grub2< 2.04-16
Fedoraproject1 product
- fedoraEOL33 | 34
Gnu1 product
- grub2< 2.06
Netapp1 product
6 vendors · 10 products
