CVE-2025-61661

Summary

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.

Affected Software

VendorProductVersion RangeStatus
GNUgrub20 <= 2.14affected

Weaknesses

  • CWE-131: Incorrect Calculation of Buffer Size

Workarounds

As a mitigation Red Hat doesn't recommend to connect untrusted or unknown USB devices to the machine.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References