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CVE-2025-54771

Grub2: use-after-free in grub_file_close()

4.9 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
Low

Exploit likelihood

0.15%Up 0.1 points since Nov 19, 2025
90%50%10%1%

What each source reports

CVE List Score used 4.9

Grub2: use-after-free in grub_file_close()

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.

Record
CVE-2025-54771
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-825
Updated
2026-11-05
EUVDEUVD-2025-198082 4.9

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.

Record
EUVD-2025-198082
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-05
GitHub AdvisoriesGHSA-5rr4-3f6q-m7hp 4.9

A use-after-free vulnerability has been identified in the GNU GRUB (Grand Unified Bootloader)....

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.

Record
GHSA-5rr4-3f6q-m7hp
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-825
Updated
2026-11-02
NVD 4.9

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.

Record
CVE-2025-54771
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-825
Updated
2026-11-05
OSV 4.9

Grub2: use-after-free in grub_file_close()

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.

Record
CVE-2025-54771
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness
CWE-825
Updated
2026-11-07
OSVDEBIAN-CVE-2025-54771 4.9

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.

Record
DEBIAN-CVE-2025-54771
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-06
Show 18 moreShow less
OSVOESA-2025-2735 4.9

grub2 security update

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 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)

Record
OESA-2025-2735
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVOESA-2025-2736 4.9

grub2 security update

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 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)

Record
OESA-2025-2736
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVOESA-2025-2737 4.9

grub2 security update

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 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)

Record
OESA-2025-2737
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVOESA-2025-2738 4.9

grub2 security update

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)

Record
OESA-2025-2738
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVOESA-2025-2739 4.9

grub2 security update

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)

Record
OESA-2025-2739
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2025-54771 4.9

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.

Record
UBUNTU-CVE-2025-54771
CVSS 3.1
4.9 MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated
2026-11-02
OSVopenSUSE-SU-2025:15749-1 No score

grub2-2.12-67.1 on GA media

These are all security issues fixed in the grub2-2.12-67.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15749-1
Updated
2026-11-02
OSVopenSUSE-SU-2025:20163-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

Changes in grub2:

  • CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)

  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)

  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)

  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)

  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

  • Bump upstream SBAT generation to 6

  • Fix "sparse file not allowed" error after grub2-reboot (bsc#1245738)

  • Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)

  • turn off page flipping for i386-pc using VBE video backend (bsc#1245636)

  • Fix boot hangs in setting up serial console when ACPI SPCR table is present and redirection is disabled (bsc#1249088)

  • Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)

  • Skip mount point in grub_find_device function (bsc#1246231)

  • CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)

Record
openSUSE-SU-2025:20163-1
Updated
2026-11-02
OSVSUSE-SU-2025:21062-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)
  • CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932)
  • CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)
Record
SUSE-SU-2025:21062-1
Updated
2026-11-02
OSVSUSE-SU-2025:21212-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

Changes in grub2:

  • CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)

  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)

  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)

  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)

  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

  • Bump upstream SBAT generation to 6

  • Fix "sparse file not allowed" error after grub2-reboot (bsc#1245738)

  • Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)

  • turn off page flipping for i386-pc using VBE video backend (bsc#1245636)

  • Fix boot hangs in setting up serial console when ACPI SPCR table is present and redirection is disabled (bsc#1249088)

  • Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)

  • Skip mount point in grub_find_device function (bsc#1246231)

  • CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)

Record
SUSE-SU-2025:21212-1
Updated
2026-11-02
OSVSUSE-SU-2025:21223-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

Changes in grub2:

  • CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)

  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)

  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)

  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)

  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

  • Bump upstream SBAT generation to 6

  • Fix "sparse file not allowed" error after grub2-reboot (bsc#1245738)

  • Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)

  • turn off page flipping for i386-pc using VBE video backend (bsc#1245636)

  • Fix boot hangs in setting up serial console when ACPI SPCR table is present and redirection is disabled (bsc#1249088)

  • Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)

  • Skip mount point in grub_find_device function (bsc#1246231)

  • CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)

Record
SUSE-SU-2025:21223-1
Updated
2026-11-02
OSVSUSE-SU-2025:4143-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

Other fixes:

  • Bump upstream SBAT generation to 6
Record
SUSE-SU-2025:4143-1
Updated
2026-11-02
OSVSUSE-SU-2025:4152-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

Other fixes:

  • Bump upstream SBAT generation to 6
Record
SUSE-SU-2025:4152-1
Updated
2026-11-02
OSVSUSE-SU-2025:4196-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)
  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

Other fixes:

  • Bump upstream SBAT generation to 6
  • Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)
  • Fix PPC CAS reboot failure work when initiated via submenu (bsc#1241132)
  • Fix out of memory issue on PowerPC by increasing RMA size (bsc#1236744, bsc#1252269)
Record
SUSE-SU-2025:4196-1
Updated
2026-11-02
OSVSUSE-SU-2025:4197-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

Other fixes:

  • Bump upstream SBAT generation to 6
Record
SUSE-SU-2025:4197-1
Updated
2026-11-02
OSVSUSE-SU-2025:4224-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)

Other fixes:

  • Bump upstream SBAT generation to 6
Record
SUSE-SU-2025:4224-1
Updated
2026-11-02
OSVSUSE-SU-2025:4305-1 No score

Security update for grub2

This update for grub2 fixes the following issues:

  • CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)
  • CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)
  • CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)
  • CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)
  • CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)
  • CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)

Other fixes:

  • Bump upstream SBAT generation to 6
  • Fixed timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)
Record
SUSE-SU-2025:4305-1
Updated
2026-11-02
OSVSUSE-SU-2026:21621-1 No score

Security update for grub2

This update for grub2 fixes the following issues

  • CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930).
  • CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931).
  • CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932).
  • CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933).
  • CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934).
  • CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935).

Changes for grub2:

  • Bump upstream SBAT generation to 6
Record
SUSE-SU-2026:21621-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
grub2
Debian:12
 All versions, plus listed versions
2.06-132.06-13+deb12u12.06-13+deb12u22.06-13+hurd.12.06-13+hurd.2
Show 34 moreShow less
2.06-142.12-12.12-1.12.12-1~bpo12+12.12-22.12-2~deb13u12.12-32.12-42.12-52.12-5+hurd.12.12-62.12-72.12-82.12-92.12-9+hurd.12.12~rc1-12.12~rc1-102.12~rc1-112.12~rc1-122.12~rc1-132.12~rc1-22.12~rc1-32.12~rc1-62.12~rc1-72.12~rc1-82.12~rc1-92.14-12.14-22.14-32.14-42.14-52.14~git20250718.0e36779-12.14~git20250718.0e36779-22.16-1
 None known
grub2
Debian:13
 All versions, plus listed versions
2.12-92.12-9+deb13u12.12-9+deb13u22.12-9+hurd.12.14-1
Show 7 moreShow less
2.14-22.14-32.14-42.14-52.14~git20250718.0e36779-12.14~git20250718.0e36779-22.16-1
 None known
grub2
Debian:14
 before 2.14-1, plus listed versions
2.12-92.12-9+hurd.12.14~git20250718.0e36779-12.14~git20250718.0e36779-2
2.14-1
grub2
openEuler:24.03-LTS
From an advisory covering 6 CVEs
 before 2.12-47.oe2403
2.12-47.oe2403
grub2
openEuler:24.03-LTS-SP1
From an advisory covering 6 CVEs
 before 2.12-47.oe2403sp1
2.12-47.oe2403sp1
grub2
openEuler:24.03-LTS-SP2
From an advisory covering 6 CVEs
 before 2.12-47.oe2403sp2
2.12-47.oe2403sp2
grub2
openEuler:22.03-LTS-SP3
From an advisory covering 5 CVEs
 before 2.06-53.oe2203sp3
2.06-53.oe2203sp3
grub2
openEuler:22.03-LTS-SP4
From an advisory covering 5 CVEs
 before 2.06-53.oe2203sp4
2.06-53.oe2203sp4
grub2
SUSE:Linux Micro 6.1
From an advisory covering 6 CVEs
 before 2.12-slfo.1.1_3.1
2.12-slfo.1.1_3.1
grub2
SUSE:Linux Enterprise Server 16.0
From an advisory covering 7 CVEs
 before 2.12-160000.3.1
2.12-160000.3.1
Show 32 moreShow less
Affected packages
PackageAffectedFixed
grub2
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 7 CVEs
 before 2.12-160000.3.1
2.12-160000.3.1
grub2
SUSE:Linux Micro 6.2
From an advisory covering 7 CVEs
 before 2.12-160000.3.1
2.12-160000.3.1
grub2
SUSE:Linux Enterprise Micro 5.2
From an advisory covering 5 CVEs
 before 2.04-150300.22.61.1
2.04-150300.22.61.1
grub2
SUSE:Linux Enterprise Micro 5.5
From an advisory covering 5 CVEs
 before 2.06-150500.29.59.1
2.06-150500.29.59.1
grub2
SUSE:Linux Enterprise Module for Basesystem 15 SP6
From an advisory covering 6 CVEs
 before 2.12-150600.8.44.2
2.12-150600.8.44.2
grub2
SUSE:Linux Enterprise Module for Server Applications 15 SP6
From an advisory covering 6 CVEs
 before 2.12-150600.8.44.2
2.12-150600.8.44.2
grub2
openSUSE:Leap 15.6
From an advisory covering 6 CVEs
 before 2.12-150600.8.44.2
2.12-150600.8.44.2
grub2
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
From an advisory covering 5 CVEs
 before 2.02-193.1
2.02-193.1
grub2
SUSE:Linux Enterprise Micro 5.3
From an advisory covering 5 CVEs
 before 2.06-150400.11.66.1
2.06-150400.11.66.1
grub2
SUSE:Linux Enterprise Micro 5.4
From an advisory covering 5 CVEs
 before 2.06-150400.11.66.1
2.06-150400.11.66.1
grub2
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 6 CVEs
 before 2.12-150700.19.19.1
2.12-150700.19.19.1
grub2
SUSE:Linux Enterprise Module for Server Applications 15 SP7
From an advisory covering 6 CVEs
 before 2.12-150700.19.19.1
2.12-150700.19.19.1
grub2
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
2.00-19ubuntu22.00-19ubuntu32.00-19ubuntu42.00-202.00-21
Show 23 moreShow less
2.00-222.02~beta2-52.02~beta2-62.02~beta2-72.02~beta2-82.02~beta2-92.02~beta2-9ubuntu12.02~beta2-9ubuntu1.12.02~beta2-9ubuntu1.22.02~beta2-9ubuntu1.32.02~beta2-9ubuntu1.42.02~beta2-9ubuntu1.52.02~beta2-9ubuntu1.62.02~beta2-9ubuntu1.72.02~beta2-9ubuntu1.82.02~beta2-9ubuntu1.112.02~beta2-9ubuntu1.122.02~beta2-9ubuntu1.142.02~beta2-9ubuntu1.152.02~beta2-9ubuntu1.162.02~beta2-9ubuntu1.172.02~beta2-9ubuntu1.202.02~beta2-9ubuntu1.21
 None known
grub2-signed
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.221.231.241.251.26
Show 23 moreShow less
1.271.301.311.321.331.341.34.11.34.21.34.31.34.41.34.51.34.61.34.71.34.81.34.91.34.131.34.141.34.161.34.171.34.181.34.201.34.221.34.24
 None known
grub2-signed
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.551.561.571.581.59
Show 32 moreShow less
1.611.621.631.641.651.661.66.11.66.21.66.61.66.71.66.81.66.91.66.111.66.121.66.141.66.151.66.161.66.171.66.181.66.191.66.201.66.211.66.221.66.231.66.261.66.271.66.281.66.291.167~16.04.11.167~16.04.21.167~16.04.41.167~16.04.6
 None known
grub2-unsigned
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.04-1ubuntu442.04-1ubuntu44.12.04-1ubuntu44.1.2
 None known
grub2-signed
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.851.861.871.891.91
Show 27 moreShow less
1.921.931.93.11.93.21.93.31.93.41.93.51.93.71.93.81.93.101.93.111.93.131.93.141.93.151.93.161.93.181.93.191.93.201.93.211.93.221.93.241.167~18.04.11.167~18.04.31.167~18.04.51.173.2~18.04.11.187.2~18.04.11.187.3~18.04.1
 None known
grub2-unsigned
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.04-1ubuntu442.04-1ubuntu44.12.04-1ubuntu44.1.22.04-1ubuntu47.42.06-2ubuntu142.06-2ubuntu14.1
 None known
grub2-signed
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.1281.1291.1301.1311.133
Show 27 moreShow less
1.1341.1351.1361.1371.1381.1391.1401.1411.1421.142.11.142.31.142.41.142.51.142.61.142.81.142.91.142.101.142.111.1671.167.21.173.2~20.04.11.173.41.187.2~20.04.21.187.3~20.04.11.187.4~20.04.11.187.6~20.04.11.187.12~20.04
 None known
grub2-unsigned
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.04-1ubuntu442.04-1ubuntu44.22.04-1ubuntu47.42.04-1ubuntu47.52.06-2ubuntu14
Show 4 moreShow less
2.06-2ubuntu14.12.06-2ubuntu14.22.06-2ubuntu14.42.06-2ubuntu14.8
 None known
grub2-signed
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.1731.1741.1761.1771.178
Show 8 moreShow less
1.1791.1801.182~22.04.11.187.21.187.3~22.04.11.187.4~22.04.11.187.61.187.12
 None known
grub2-unsigned
Ubuntu:22.04:LTS
 All versions, plus listed versions
2.04-1ubuntu472.04-1ubuntu482.06-2ubuntu32.06-2ubuntu42.06-2ubuntu5
Show 8 moreShow less
2.06-2ubuntu62.06-2ubuntu72.06-2ubuntu102.06-2ubuntu142.06-2ubuntu14.12.06-2ubuntu14.22.06-2ubuntu14.42.06-2ubuntu14.8
 None known
grub2-signed
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.1971.1991.2011.2021.202.21.202.5
 None known
grub2-unsigned
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.12~rc1-10ubuntu42.12~rc1-12ubuntu22.12-1ubuntu12.12-1ubuntu72.12-1ubuntu7.12.12-1ubuntu7.3
 None known
grub2-signed
Ubuntu:25.10
 All versions, plus listed versions
1.2121.2131.214
 None known
grub2-unsigned
Ubuntu:25.10
 All versions, plus listed versions
2.12-5ubuntu112.14~git20250718.0e36779-1ubuntu12.14~git20250718.0e36779-1ubuntu4
 None known
grub2-signed
Ubuntu:26.10
 All versions, plus listed versions
1.215
 None known
grub2-unsigned
Ubuntu:26.10
 All versions, plus listed versions
2.14-2ubuntu1
 None known
grub2-signed
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.2141.215
 None known
grub2-unsigned
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.14~git20250718.0e36779-1ubuntu42.14-2ubuntu1
 None known
grub2
openSUSE:Tumbleweed
From an advisory covering 6 CVEs
 before 2.12-67.1
2.12-67.1
grub2
openSUSE:Leap 16.0
From an advisory covering 7 CVEs
 before 2.12-160000.3.1
2.12-160000.3.1

History

History
RecordedChangedSources
affectedOSV
affectedEUVD, NVD, OSV
factsCVE List
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-54771 is a medium vulnerability (CVSS 4.9) in Gnu Grub2, published November 18, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. Fixed in grub2 2.14-1.

References

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