{"id":"CVE-2025-61663","aliases":["AZL-70523","AZL-70577","DEBIAN-CVE-2025-61663","EUVD-2025-198080","GHSA-jf88-7285-jch4","OESA-2025-2735","OESA-2025-2736","OESA-2025-2737","OESA-2025-2738","OESA-2025-2739","OESA-2026-1071","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","SUSE-SU-2025:4196-1","SUSE-SU-2025:4197-1","SUSE-SU-2025:4224-1","SUSE-SU-2025:4305-1","SUSE-SU-2026:21621-1","UBUNTU-CVE-2025-61663","openSUSE-SU-2025:15749-1","openSUSE-SU-2025:20163-1"],"status":"published","title":"Grub2: missing unregister call for normal commands may lead to use-after-free","description":"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 An attacker who can execute this command can force the system to access memory locations that are no longer valid.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.","severity":{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00139,"percentile":0.03276,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-825"],"published":"2025-11-18T18:20:52Z","modified":"2026-11-06T10:04:14Z","fixes":[{"ecosystem":"Azure Linux:2","package":"grub2","fixed_in":["2.06-16"],"sources":["osv"]},{"ecosystem":"Azure Linux:3","package":"grub2","fixed_in":["2.06-26"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"grub2","fixed_in":["2.14-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:2","package":"grub2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.06-16"}]}]},{"source":"osv","ecosystem":"Azure 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missing unregister call for normal commands may lead to use-after-free","description":"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.","status":"published","published":"2025-11-18T18:20:52.865Z","modified":"2026-11-05T16:35:02.101Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-825"],"updated_at":"2026-11-05T17:53:58.265681Z"}],"euvd":[{"id":"EUVD-2025-198080","description":"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.","status":"published","published":"2025-11-18T18:20:52Z","modified":"2026-11-05T16:35:02Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-05T18:00:57.863749Z"}],"ghsa":[{"id":"GHSA-jf88-7285-jch4","title":"A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an...","description":"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.","status":"published","published":"2025-11-18T21:32:31Z","modified":"2025-11-18T21:32:37Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-825"],"updated_at":"2026-11-02T15:04:51.826106Z"}],"nvd":[{"id":"CVE-2025-61663","description":"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.","status":"published","published":"2025-11-18T19:15:50.387Z","modified":"2026-11-05T17:17:17.327Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-825"],"updated_at":"2026-11-05T19:55:51.56159Z"}],"osv":[{"id":"CVE-2025-61663","title":"Grub2: missing unregister call for normal commands may lead to use-after-free","description":"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.","status":"published","published":"2025-11-18T18:20:52.865Z","modified":"2026-11-08T10:31:07.646656228Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-825"],"updated_at":"2026-11-07T03:07:58.118356Z"},{"id":"DEBIAN-CVE-2025-61663","description":"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.","status":"published","published":"2025-11-18T19:15:50.387Z","modified":"2026-11-06T10:04:14.880393761Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-06T10:38:22.758306Z"},{"id":"OESA-2025-2735","title":"grub2 security update","description":"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)","status":"published","published":"2025-11-28T11:09:51Z","modified":"2026-08-18T01:19:21.255036158Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"OESA-2025-2736","title":"grub2 security update","description":"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)","status":"published","published":"2025-11-28T11:09:51Z","modified":"2026-08-18T01:19:21.997507573Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"OESA-2025-2737","title":"grub2 security update","description":"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)","status":"published","published":"2025-11-28T11:09:51Z","modified":"2026-08-18T01:19:21.392904971Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"OESA-2025-2738","title":"grub2 security update","description":"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)","status":"published","published":"2025-11-28T11:09:51Z","modified":"2026-08-18T01:19:20.999852892Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"OESA-2025-2739","title":"grub2 security update","description":"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)","status":"published","published":"2025-11-28T11:09:51Z","modified":"2026-08-18T01:19:20.28340298Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"OESA-2026-1071","title":"grub2 security update","description":"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 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)","status":"published","published":"2026-01-16T11:10:06Z","modified":"2026-08-18T01:19:26.492444166Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:45.339366Z"},{"id":"UBUNTU-CVE-2025-61663","description":"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.","status":"published","published":"2025-11-18T19:15:00Z","modified":"2026-10-17T12:57:22.237709795Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T16:55:50.817402Z"},{"id":"AZL-70523","title":"CVE-2025-61663 affecting package grub2 for versions less than 2.06-16","description":"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.","status":"published","published":"2025-11-18T19:15:50Z","modified":"2026-04-21T04:36:24.726869Z","updated_at":"2026-11-02T15:28:08.907584Z"},{"id":"AZL-70577","title":"CVE-2025-61663 affecting package grub2 for versions less than 2.06-26","description":"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.","status":"published","published":"2025-11-18T19:15:50Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:24.144367Z"},{"id":"openSUSE-SU-2025:15749-1","title":"grub2-2.12-67.1 on GA media","description":"These are all security issues fixed in the grub2-2.12-67.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-11-20T00:00:00Z","modified":"2026-03-23T04:54:09.825597Z","updated_at":"2026-11-02T16:58:37.810934Z"},{"id":"openSUSE-SU-2025:20163-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nChanges in grub2:\n\n- CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)\n- CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free  (bsc#1252930)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)\n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n\n- Bump upstream SBAT generation to 6\n\n- Fix \"sparse file not allowed\" error after grub2-reboot (bsc#1245738)\n- Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)\n- turn off page flipping for i386-pc using VBE video backend (bsc#1245636)\n- Fix boot hangs in setting up serial console when ACPI SPCR table is present\n  and redirection is disabled (bsc#1249088)\n- Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)\n- Skip mount point in grub_find_device function (bsc#1246231)\n\n- CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)\n","status":"published","published":"2025-12-15T12:52:50Z","modified":"2026-03-23T04:54:18.975294Z","updated_at":"2026-11-02T16:58:38.101535Z"},{"id":"SUSE-SU-2025:21062-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)\n- CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931)\n- CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n- CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933)\n- CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n","status":"published","published":"2025-11-21T13:08:14Z","modified":"2026-03-23T04:49:14.45617Z","updated_at":"2026-11-02T15:53:59.92114Z"},{"id":"SUSE-SU-2025:21212-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nChanges in grub2:\n\n- CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)\n- CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free  (bsc#1252930)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)\n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n\n- Bump upstream SBAT generation to 6\n\n- Fix \"sparse file not allowed\" error after grub2-reboot (bsc#1245738)\n- Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)\n- turn off page flipping for i386-pc using VBE video backend (bsc#1245636)\n- Fix boot hangs in setting up serial console when ACPI SPCR table is present\n  and redirection is disabled (bsc#1249088)\n- Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)\n- Skip mount point in grub_find_device function (bsc#1246231)\n\n- CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)\n","status":"published","published":"2025-12-15T12:49:56Z","modified":"2026-03-23T04:51:16.297112Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:21223-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nChanges in grub2:\n\n- CVE-2025-54771: Fixed grub_file_close() does not properly controls the fs refcount (bsc#1252931)\n- CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free  (bsc#1252930)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)\n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n\n- Bump upstream SBAT generation to 6\n\n- Fix \"sparse file not allowed\" error after grub2-reboot (bsc#1245738)\n- Fix PowerPC network boot prefix to correctly locate grub.cfg (bsc#1249385)\n- turn off page flipping for i386-pc using VBE video backend (bsc#1245636)\n- Fix boot hangs in setting up serial console when ACPI SPCR table is present\n  and redirection is disabled (bsc#1249088)\n- Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)\n- Skip mount point in grub_find_device function (bsc#1246231)\n\n- CVE-2024-56738: Fixed side-channel attack due to not constant-time algorithm in grub_crypto_memcmp (bsc#1234959)\n","status":"published","published":"2025-12-15T12:49:56Z","modified":"2026-03-23T04:49:18.434555Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4143-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) \n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) \n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n\nOther fixes:\n\n- Bump upstream SBAT generation to 6\n","status":"published","published":"2025-11-20T07:54:03Z","modified":"2026-02-04T03:07:39.899122Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4152-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) \n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) \n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n\nOther fixes:\n\n- Bump upstream SBAT generation to 6\n","status":"published","published":"2025-11-21T09:10:39Z","modified":"2026-02-04T04:00:32.371581Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4196-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) \n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) \n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n\nOther fixes:\n\n- Bump upstream SBAT generation to 6\n- Fix timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)\n- Fix PPC CAS reboot failure work when initiated via submenu (bsc#1241132)\n- Fix out of memory issue on PowerPC by increasing RMA size (bsc#1236744, bsc#1252269)\n","status":"published","published":"2025-11-24T10:54:24Z","modified":"2026-03-23T04:49:21.713932Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4197-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) \n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) \n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n\nOther fixes:\n\n- Bump upstream SBAT generation to 6\n","status":"published","published":"2025-11-24T11:04:06Z","modified":"2026-03-23T04:51:27.061648Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4224-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) \n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) \n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n\nOther fixes:\n\n- Bump upstream SBAT generation to 6\n","status":"published","published":"2025-11-25T09:53:55Z","modified":"2026-03-23T04:51:39.321354Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2025:4305-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931)\n- CVE-2025-54770: Fixed missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930)\n- CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933)\n- CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934)\n- CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935)\n- CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932)\n  \nOther fixes:\n\n- Bump upstream SBAT generation to 6\n- Fixed timeout when loading initrd via http after PPC CAS reboot (bsc#1245953)\n","status":"published","published":"2025-11-28T13:33:43Z","modified":"2026-02-04T03:07:15.291366Z","updated_at":"2026-11-02T15:54:00.344164Z"},{"id":"SUSE-SU-2026:21621-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues\n\n- CVE-2025-54770: Missing unregister call for net_set_vlan command may lead to use-after-free (bsc#1252930).\n- CVE-2025-54771: grub_file_close() does not properly controls the fs refcount (bsc#1252931).\n- CVE-2025-61661: Out-of-bounds write in grub_usb_get_string() function (bsc#1252932).\n- CVE-2025-61662: Missing unregister call for gettext command may lead to use-after-free (bsc#1252933).\n- CVE-2025-61663: Missing unregister call for normal commands may lead to use-after-free (bsc#1252934).\n- CVE-2025-61664: Missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935).\n\nChanges for grub2:\n\n- Bump upstream SBAT generation to 6\n","status":"published","published":"2026-05-11T08:48:36Z","modified":"2026-05-16T18:25:22.818838Z","updated_at":"2026-11-02T15:54:02.312556Z"}]}}