{"id":"CVE-2025-61661","summary":"Grub2: grub2: out-of-bounds write via malicious usb device","details":"A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.","modified":"2026-07-11T03:54:29.449339249Z","published":"2025-11-18T18:20:42.151Z","related":["SUSE-SU-2025:21062-1","SUSE-SU-2025:21212-1","SUSE-SU-2025:21223-1","SUSE-SU-2025:4143-1","SUSE-SU-2025:4152-1","SUSE-SU-2025:4196-1","SUSE-SU-2025:4197-1","SUSE-SU-2025:4224-1","SUSE-SU-2025:4305-1","SUSE-SU-2026:21621-1","openSUSE-SU-2025:15749-1","openSUSE-SU-2025:20163-1"],"database_specific":{"cna_assigner":"redhat","cwe_ids":["CWE-131"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61661.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/11/18/8"},{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-61661"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61661.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-61661"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2413827"},{"type":"PACKAGE","url":"https://git.savannah.gnu.org/git/grub.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://https.git.savannah.gnu.org/git/grub.git/","events":[{"introduced":"0"},{"last_affected":"d38d6a1a9b79427848976f53d474392cd29c2a71"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.14"}],"source":"AFFECTED_FIELD"}}],"versions":["grub-2.14","grub-2.14-rc1","grub-2.12","grub-2.12-rc1","grub-2.06","grub-2.06-rc1a","grub-2.06-rc1","grub-2.04","grub-2.04-rc1","grub-2.02","2.02","grub-2.02-rc2","2.02-rc2","grub-2.02-rc1","2.02-rc1","grub-2.02-beta3","2.02-beta3","grub-2.02-beta2","grub-2.02-beta1","2.00","1.99","1.98"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-61661.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}