CVE-2025-61661: CWE-131
Source GCVE Database
Not known to be exploited · CVSS 4.8 Medium.
Data as of 13 Nov 2026, 20:18 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 4.8 |
|---|
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:HExploitation evidence
Disclosed: evidence found.
CVE published 18 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GNUgrub2 | Affected
| Fixed in– |
AI-suggested
Red Hat does not currently provide a patch for this vulnerability. The recommended mitigation is to avoid connecting untrusted or unknown USB devices to the machine.
Description
A vulnerability in the GRUB bootloader allows a local attacker with physical access to cause a denial of service by connecting a malicious USB device during boot. The flaw is due to improper string length handling when reading USB device information, potentially causing GRUB to crash or experience data corruption. Exploitation complexity is high, and the impact is mostly limited to denial of service with low integrity impact.