An update for grub2 is now available for openEuler-22.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2025-2738 Final 1.0 1.0 2025-11-28 Initial 2025-11-28 2025-11-28 openEuler SA Tool V1.0 2025-11-28 grub2 security update An update for grub2 is now available for openEuler-22.03-LTS-SP3 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 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) 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exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid.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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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) An update for grub2 is now available for openEuler-22.03-LTS-SP3. openEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Medium grub2 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-54771 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-61661 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-61662 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-61663 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-61664 https://nvd.nist.gov/vuln/detail/CVE-2025-54771 https://nvd.nist.gov/vuln/detail/CVE-2025-61661 https://nvd.nist.gov/vuln/detail/CVE-2025-61662 https://nvd.nist.gov/vuln/detail/CVE-2025-61663 https://nvd.nist.gov/vuln/detail/CVE-2025-61664 openEuler-22.03-LTS-SP3 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 grub2-2.06-53.oe2203sp3.src.rpm 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 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 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. 2025-11-28 CVE-2025-54771 openEuler-22.03-LTS-SP3 Medium 4.9 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L grub2 security update 2025-11-28 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738 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. 2025-11-28 CVE-2025-61661 openEuler-22.03-LTS-SP3 Medium 4.8 AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H grub2 security update 2025-11-28 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738 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. 2025-11-28 CVE-2025-61662 openEuler-22.03-LTS-SP3 Medium 4.9 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L grub2 security update 2025-11-28 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738 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. 2025-11-28 CVE-2025-61663 openEuler-22.03-LTS-SP3 Medium 4.9 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L grub2 security update 2025-11-28 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738 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. 2025-11-28 CVE-2025-61664 openEuler-22.03-LTS-SP3 Medium 4.9 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L grub2 security update 2025-11-28 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2738