Vulnerability-Lookup

GHSA-CJCH-253G-8HP2

Vulnerability from github – Published: 2025-11-18 21:32 – Updated: 2025-11-19 00:31

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.

Severity ?

4.8 (Medium)


                  
                    CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-61661"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-131"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-18T19:15:49Z",
    "severity": "MODERATE"
  },
  "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.",
  "id": "GHSA-cjch-253g-8hp2",
  "modified": "2025-11-19T00:31:24Z",
  "published": "2025-11-18T21:32:31Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61661"
    },
    {
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      "url": "https://access.redhat.com/security/cve/CVE-2025-61661"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2413827"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/11/18/8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-61661 (GCVE-0-2025-61661)

Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2025-12-19 16:33

Title

Grub2: grub2: out-of-bounds write via malicious usb device

Summary

Severity ?

4.8 (Medium)


                        
                          CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CWE

CWE-131 - Incorrect Calculation of Buffer Size

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2025-61661	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2413827	issue-trackingx_refsource_REDHAT

Impacted products

Vendor

Product

Version

GNU

grub2

Affected: 0 , ≤ 2.14 (semver)

Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-CJCH-253G-8HP2

CVE-2025-61661 (GCVE-0-2025-61661)

Tags

Sightings

Nomenclature