Vulnerability-Lookup

CVE-2025-54771 (GCVE-0-2025-54771)

Vulnerability from cvelistv5 – Published: 2025-11-18 18:20 – Updated: 2026-09-01 11:53

Title

Grub2: use-after-free in grub_file_close()

Summary

A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.

Severity

4.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-11-19 14:17 UTC

CWE

CWE-825 - Expired Pointer Dereference

Assigner

redhat redhat root Scorecard

References

4 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2025-54771	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2413823	issue-trackingx_refsource_REDHAT
https://lists.gnu.org/archive/html/grub-devel/202…
http://www.openwall.com/lists/oss-security/2025/11/18/3

Impacted products

6 products

Vendor	Product	Version	CPE status
GNU	grub2	Affected: 0 , ≤ 2.14 (semver)	guessed
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

Date Public

2025-11-18 00:00

Show details on NVD website

JSON

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      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

OESA-2025-2737 (CVE-2025-54770)

Vulnerability from osv_openeuler – Published: 2025-11-28 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

grub2 security update

Details

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.

Security Fix(es):

A vulnerability has been identified in the GRUB2 bootloader's network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability(CVE-2025-54770)

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.(CVE-2025-61661)

A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-61662)

A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.(CVE-2025-61663)

A vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.(CVE-2025-61664)

Severity

4.9 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-54770	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-54771	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61661	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61662	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61663	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61664	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debuginfo-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-debugsource-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-efi-aa64-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-efi-aa64-cdboot-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-tools-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-tools-extra-2.12-47.oe2403sp2.aarch64.rpm",
          "grub2-tools-minimal-2.12-47.oe2403sp2.aarch64.rpm"
        ],
        "noarch": [
          "grub2-common-2.12-47.oe2403sp2.noarch.rpm",
          "grub2-efi-aa64-modules-2.12-47.oe2403sp2.noarch.rpm",
          "grub2-efi-ia32-modules-2.12-47.oe2403sp2.noarch.rpm",
          "grub2-efi-x64-modules-2.12-47.oe2403sp2.noarch.rpm",
          "grub2-help-2.12-47.oe2403sp2.noarch.rpm",
          "grub2-pc-modules-2.12-47.oe2403sp2.noarch.rpm"
        ],
        "src": [
          "grub2-2.12-47.oe2403sp2.src.rpm"
        ],
        "x86_64": [
          "grub2-debuginfo-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-debugsource-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-efi-ia32-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-efi-x64-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-pc-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-tools-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-tools-efi-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-tools-extra-2.12-47.oe2403sp2.x86_64.rpm",
          "grub2-tools-minimal-2.12-47.oe2403sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP2",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-24.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.12-47.oe2403sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.\r\n\r\nSecurity Fix(es):\n\nA vulnerability has been identified in the GRUB2 bootloader\u0026apos;s network module that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the net_set_vlan command is not properly unregistered when the network module is unloaded from memory. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability(CVE-2025-54770)\n\nA use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-54771)\n\nA 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.(CVE-2025-61661)\n\nA Use-After-Free vulnerability has been discovered in GRUB\u0026apos;s gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-61662)\n\nA vulnerability has been identified in the GRUB2 bootloader\u0026apos;s normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.(CVE-2025-61663)\n\nA vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.(CVE-2025-61664)",
  "id": "OESA-2025-2737",
  "modified": "2026-08-06T11:09:51Z",
  "published": "2025-11-28T11:09:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2737"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54770"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54771"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61661"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61662"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61663"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61664"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "grub2 security update",
  "upstream": [
    "CVE-2025-54770",
    "CVE-2025-54771",
    "CVE-2025-61661",
    "CVE-2025-61662",
    "CVE-2025-61663",
    "CVE-2025-61664"
  ]
}

OESA-2025-2738 (CVE-2025-54771)

Vulnerability from osv_openeuler – Published: 2025-11-28 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

grub2 security update

Details

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.

Security Fix(es):

Severity

4.9 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-54771	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61661	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61662	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61663	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61664	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debuginfo-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-debugsource-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-efi-aa64-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-efi-aa64-cdboot-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-tools-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-tools-extra-2.06-53.oe2203sp3.aarch64.rpm",
          "grub2-tools-minimal-2.06-53.oe2203sp3.aarch64.rpm"
        ],
        "noarch": [
          "grub2-common-2.06-53.oe2203sp3.noarch.rpm",
          "grub2-efi-aa64-modules-2.06-53.oe2203sp3.noarch.rpm",
          "grub2-efi-ia32-modules-2.06-53.oe2203sp3.noarch.rpm",
          "grub2-efi-x64-modules-2.06-53.oe2203sp3.noarch.rpm",
          "grub2-help-2.06-53.oe2203sp3.noarch.rpm",
          "grub2-pc-modules-2.06-53.oe2203sp3.noarch.rpm"
        ],
        "src": [
          "grub2-2.06-53.oe2203sp3.src.rpm"
        ],
        "x86_64": [
          "grub2-debuginfo-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-debugsource-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-efi-ia32-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-efi-x64-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-pc-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-tools-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-tools-efi-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-tools-extra-2.06-53.oe2203sp3.x86_64.rpm",
          "grub2-tools-minimal-2.06-53.oe2203sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP3",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-22.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-53.oe2203sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.\r\n\r\nSecurity Fix(es):\n\nA use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-54771)\n\nA 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.(CVE-2025-61661)\n\nA Use-After-Free vulnerability has been discovered in GRUB\u0026apos;s gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-61662)\n\nA vulnerability has been identified in the GRUB2 bootloader\u0026apos;s normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.(CVE-2025-61663)\n\nA vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.(CVE-2025-61664)",
  "id": "OESA-2025-2738",
  "modified": "2026-08-06T11:09:51Z",
  "published": "2025-11-28T11:09:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54771"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61661"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61662"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61663"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61664"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "grub2 security update",
  "upstream": [
    "CVE-2025-54771",
    "CVE-2025-61661",
    "CVE-2025-61662",
    "CVE-2025-61663",
    "CVE-2025-61664"
  ]
}

OESA-2025-2739 (CVE-2025-54771)

Vulnerability from osv_openeuler – Published: 2025-11-28 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

grub2 security update

Details

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.

Security Fix(es):

Severity

4.9 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-54771	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61661	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61662	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61663	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61664	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "grub2-debuginfo-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-debugsource-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-efi-aa64-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-efi-aa64-cdboot-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-tools-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-tools-extra-2.06-53.oe2203sp4.aarch64.rpm",
          "grub2-tools-minimal-2.06-53.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "grub2-common-2.06-53.oe2203sp4.noarch.rpm",
          "grub2-efi-aa64-modules-2.06-53.oe2203sp4.noarch.rpm",
          "grub2-efi-ia32-modules-2.06-53.oe2203sp4.noarch.rpm",
          "grub2-efi-x64-modules-2.06-53.oe2203sp4.noarch.rpm",
          "grub2-help-2.06-53.oe2203sp4.noarch.rpm",
          "grub2-pc-modules-2.06-53.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "grub2-2.06-53.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "grub2-debuginfo-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-debugsource-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-efi-ia32-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-efi-ia32-cdboot-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-efi-x64-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-efi-x64-cdboot-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-pc-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-tools-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-tools-efi-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-tools-extra-2.06-53.oe2203sp4.x86_64.rpm",
          "grub2-tools-minimal-2.06-53.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "grub2",
        "purl": "pkg:rpm/openEuler/grub2\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-53.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn.\r\n\r\nSecurity Fix(es):\n\nA use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader). The flaw occurs because the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-54771)\n\nA 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.(CVE-2025-61661)\n\nA Use-After-Free vulnerability has been discovered in GRUB\u0026apos;s gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.(CVE-2025-61662)\n\nA vulnerability has been identified in the GRUB2 bootloader\u0026apos;s normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.(CVE-2025-61663)\n\nA vulnerability in the GRUB2 bootloader has been identified in the normal module. This flaw, a memory Use After Free issue, occurs because the normal_exit command is not properly unregistered when its related module is unloaded. An attacker can exploit this condition by invoking the command after the module has been removed, causing the system to improperly access a previously freed memory location. This leads to a system crash or possible impacts in data confidentiality and integrity.(CVE-2025-61664)",
  "id": "OESA-2025-2739",
  "modified": "2026-08-06T11:09:51Z",
  "published": "2025-11-28T11:09:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2739"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54771"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61661"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61662"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61663"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61664"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "grub2 security update",
  "upstream": [
    "CVE-2025-54771",
    "CVE-2025-61661",
    "CVE-2025-61662",
    "CVE-2025-61663",
    "CVE-2025-61664"
  ]
}

OPENSUSE-SU-2025:15749-1

Vulnerability from csaf_opensuse - Published: 2025-11-20 00:00 - Updated: 2026-09-20 21:45

Summary

grub2-2.12-67.1 on GA media

Severity

Moderate

Scope

6 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 88 products

Open the full advisory

OPENSUSE-SU-2025:20163-1

Vulnerability from csaf_opensuse - Published: 2025-12-15 12:52 - Updated: 2026-09-20 21:48

Summary

Security update for grub2

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 31 products

Open the full advisory

SUSE-SU-2025:21062-1

Vulnerability from csaf_suse - Published: 2025-11-21 13:08 - Updated: 2026-09-20 18:21

Summary

Security update for grub2

Severity

Moderate

Scope

6 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 11 products

Open the full advisory

SUSE-SU-2025:21212-1

Vulnerability from csaf_suse - Published: 2025-12-15 12:49 - Updated: 2026-09-20 18:23

Summary

Security update for grub2

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 30 products

Open the full advisory

SUSE-SU-2025:21223-1

Vulnerability from csaf_suse - Published: 2025-12-15 12:49 - Updated: 2026-09-20 18:24

Summary

Security update for grub2

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 15 products

Open the full advisory

SUSE-SU-2025:4143-1

Vulnerability from csaf_suse - Published: 2025-11-20 07:54 - Updated: 2026-09-20 18:29

Summary

Security update for grub2

Severity

Moderate

Scope

5 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 9 products

Open the full advisory

SUSE-SU-2025:4152-1

Vulnerability from csaf_suse - Published: 2025-11-21 09:10 - Updated: 2026-09-20 18:29

Summary

Security update for grub2

Severity

Moderate

Scope

5 vulnerabilities in this advisory, including CVE-2025-54771.

CVE-2025-54771

4.9 (Medium)


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

Recommended: 11 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-54771 (GCVE-0-2025-54771)

OESA-2025-2737 (CVE-2025-54770)

OESA-2025-2738 (CVE-2025-54771)

OESA-2025-2739 (CVE-2025-54771)

OPENSUSE-SU-2025:15749-1

OPENSUSE-SU-2025:20163-1

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

Tags

Sightings

Nomenclature

Related by attack behaviour