{"id":"CVE-2022-28735","aliases":["ALSA-2022:5095","ALSA-2022:5099","AZL-27551","AZL-34790","BELL-CVE-2022-28735","DEBIAN-CVE-2022-28735","EUVD-2022-33174","GHSA-w8wh-9mrg-3ff5","OESA-2022-1734","RHSA-2022:5095","RHSA-2022:5096","RHSA-2022:5098","RHSA-2022:5099","RHSA-2022:5100","RLSA-2022:5095","RLSA-2022:5099","SUSE-SU-2022:2035-1","SUSE-SU-2022:2064-1","SUSE-SU-2022:2073-1","SUSE-SU-2022:2074-1","UBUNTU-CVE-2022-28735","USN-6355-1","openSUSE-SU-2024:12137-1"],"status":"published","title":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot...","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. 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use.com/support/update/announcement/2022/suse-su-20222035-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1191184","tags":["report"]},{"url":"https://bugzilla.suse.com/1191185","tags":["report"]},{"url":"https://bugzilla.suse.com/1191186","tags":["report"]},{"url":"https://bugzilla.suse.com/1193282","tags":["report"]},{"url":"https://bugzilla.suse.com/1197948","tags":["report"]},{"url":"https://bugzilla.suse.com/1198460","tags":["report"]},{"url":"https://bugzilla.suse.com/1198493","tags":["report"]},{"url":"https://bugzilla.suse.com/1198495","tags":["report"]},{"url":"https://bugzilla.suse.com/1198496","tags":["report"]},{"url":"https://bugzilla.suse.com/1198581","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3695","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3696","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3697","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-28733","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-28734","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-28735","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-28736","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20222064-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20222073-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1071559","tags":["report"]},{"url":"https://bugzilla.suse.com/1159205","tags":["report"]},{"url":"https://bugzilla.suse.com/1179981","tags":["report"]},{"url":"https://bugzilla.suse.com/1189769","tags":["report"]},{"url":"https://bugzilla.suse.com/1189874","tags":["report"]},{"url":"https://bugzilla.suse.com/1191504","tags":["report"]},{"url":"https://bugzilla.suse.com/1191974","tags":["report"]},{"url":"https://bugzilla.suse.com/1192522","tags":["report"]},{"url":"https://bugzilla.suse.com/1192622","tags":["report"]},{"url":"https://bugzilla.suse.com/1193532","tags":["report"]},{"url":"https://bugzilla.suse.com/1195204","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20222074-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2022-28735","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6355-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-3695","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3696","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3697","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3981","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-3775","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28733","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28734","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28736","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28737","tags":["report"]},{"url":"https://launchpad.net/bugs/2029518","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2022-28735","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T00:22:51.229Z","modified":"2025-02-13T16:32:36.76Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:34:38.922686Z"}],"euvd":[{"id":"EUVD-2022-33174","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T00:22:51Z","modified":"2025-02-13T16:32:36Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-03T00:03:52.752782Z"}],"ghsa":[{"id":"GHSA-w8wh-9mrg-3ff5","title":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot...","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T03:30:25Z","modified":"2024-04-04T06:17:30Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T14:56:40.949889Z"}],"nvd":[{"id":"CVE-2022-28735","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:10.32Z","modified":"2026-06-17T04:38:56.427Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:07:38.721429Z"}],"osv":[{"id":"AZL-27551","title":"CVE-2022-28735 affecting package grub2 for versions less than 2.06-12","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:10Z","modified":"2026-04-21T04:24:24.022877Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:03.093433Z"},{"id":"AZL-34790","title":"CVE-2022-28735 affecting package grub2 for versions less than 2.06-14","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:10Z","modified":"2026-11-05T05:40:51Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-05T16:41:19.380321Z"},{"id":"BELL-CVE-2022-28735","title":"CVE-2022-28735 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:14:47.85Z","modified":"2026-01-26T09:49:06.303518Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:17.151188Z"},{"id":"CVE-2022-28735","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:10.32Z","modified":"2026-03-14T11:39:55.792342Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:25.164673Z"},{"id":"DEBIAN-CVE-2022-28735","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:10.32Z","modified":"2026-11-03T08:01:14.123072468Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T08:25:01.007408Z"},{"id":"OESA-2022-1734","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):\r\n\r\nA flaw was found in grub2 when handling split HTTP headers. While processing a split HTTP header, grub2 wrongly advances its control pointer to the internal buffer by one position, which can lead to an out-of-bounds write. This flaw allows an attacker to leverage this issue by crafting a malicious set of HTTP packages making grub2 corrupt its internal memory metadata structure. This leads to data integrity and confidentiality issues or forces grub to crash, resulting in a denial of service attack.(CVE-2022-28734)\r\n\r\nA use-after-free vulnerability was found on grub2's chainloader command. This flaw allows an attacker to gain access to restricted data or cause arbitrary code execution if they can establish control from grub's memory allocation pattern.(CVE-2022-28736)\r\n\r\nA flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be achievable.(CVE-2021-3697)\r\n\r\nA flaw was found in grub2 when handling a PNG image header. When decoding the data contained in the Huffman table at the PNG file header, an out-of-bounds write may happen on grub's heap.(CVE-2021-3696)\r\n\r\nA flaw was found in grub2 when handling IPv4 packets. This flaw allows an attacker to craft a malicious packet, triggering an integer underflow in grub code. Consequently, the memory allocation for handling the packet data may be smaller than the size needed. This issue causes an out-of-bands write during packet handling, compromising data integrity, confidentiality issues, a denial of service, and remote code execution.(CVE-2022-28733)\r\n\r\nA flaw was found in grub 2, where a crafted 16-bit grayscale PNG image may lead to an out-of-bounds write. This flaw allows an attacker to corrupt the data on the heap portion of the grub2's memory, leading to possible code execution and the circumvention of the secure boot mechanism.(CVE-2021-3695)\r\n\r\nA flaw was found in grub2. The shim_lock verifier from grub2 allows non-kernel files to be loaded when secure boot is enabled, giving the possibility of unverified code or modules to be loaded when it should not be allowed.\n(CVE-2022-28735)","status":"published","published":"2022-07-01T11:05:00Z","modified":"2026-08-18T01:16:46.313345985Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:39.528805Z"},{"id":"RHSA-2022:5095","title":"Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update","status":"published","published":"2024-09-16T08:14:17Z","modified":"2026-06-27T10:15:23Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:5096","title":"Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update","status":"published","published":"2024-09-16T08:14:09Z","modified":"2026-06-27T10:15:24Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:5098","title":"Red Hat Security Advisory: grub2, mokutil, and shim security update","status":"published","published":"2024-09-16T08:14:02Z","modified":"2026-06-27T10:15:24Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:5099","title":"Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update","status":"published","published":"2024-09-16T08:14:33Z","modified":"2026-06-27T10:15:25Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:5100","title":"Red Hat Security Advisory: grub2, mokutil, shim, and shim-unsigned-x64 security update","status":"published","published":"2024-09-16T08:14:25Z","modified":"2026-06-27T10:15:26Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.62945Z"},{"id":"RLSA-2022:5095","title":"Important: grub2, mokutil, shim, and shim-unsigned-x64 security update","description":"The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\n\nThe shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.\n\nSecurity Fix(es):\n\n* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)\n\n* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)\n\n* grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)\n\n* grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)\n\n* grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)\n\n* grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)\n\n* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)\n\n* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2022-06-16T13:10:10Z","modified":"2026-02-04T12:30:06.529922Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"RLSA-2022:5099","title":"Important: grub2, mokutil, shim, and shim-unsigned-x64 security update","description":"The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\n\nThe shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.\n\nSecurity Fix(es):\n\n* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)\n\n* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)\n\n* grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)\n\n* grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)\n\n* grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)\n\n* grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)\n\n* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)\n\n* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2022-06-16T13:17:13Z","modified":"2026-02-05T02:30:09.845929Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"UBUNTU-CVE-2022-28735","description":"The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.","status":"published","published":"2023-07-20T01:15:00Z","modified":"2026-02-04T02:48:50.37931Z","cvss":[{"version":"3.1","score":6.7,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:53:53.899276Z"},{"id":"ALSA-2022:5095","title":"Important: grub2, mokutil, shim, and shim-unsigned-x64 security update","description":"The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\nThe shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.\nSecurity Fix(es):\n* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)\n* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)\n* grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)\n* grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)\n* grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)\n* grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)\n* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)\n* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2022-06-16T00:00:00Z","modified":"2026-10-29T11:01:05.280203919Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"ALSA-2022:5099","title":"Important: grub2, mokutil, shim, and shim-unsigned-x64 security update","description":"The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\nThe shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.\nSecurity Fix(es):\n* grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)\n* grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)\n* grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)\n* grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)\n* grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)\n* grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)\n* grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)\n* shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2022-06-16T00:00:00Z","modified":"2026-10-29T11:31:10.985361647Z","updated_at":"2026-11-02T15:27:51.655726Z"},{"id":"openSUSE-SU-2024:12137-1","title":"grub2-2.06-25.1 on GA media","description":"These are all security issues fixed in the grub2-2.06-25.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:55:29.42889Z","updated_at":"2026-11-02T16:58:35.485255Z"},{"id":"SUSE-SU-2022:2035-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nThis update provides security fixes and hardenings for Boothole 3 / Boothole 2022 (bsc#1198581)\n\n- CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)\n- CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)\n- CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)\n- CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)\n- CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)\n- CVE-2022-28735: Fixed some verifier framework changes (bsc#1198495)\n- CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)\n- Update SBAT security contact (bsc#1193282)\n- Bump grub's SBAT generation to 2\n\n- Use boot disks in OpenFirmware, fixing regression caused when the root LV is completely in the boot LUN (bsc#1197948)\n","status":"published","published":"2022-06-10T08:16:51Z","modified":"2026-02-04T03:05:35.679945Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2064-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity fixes and hardenings for boothole 3 / boothole 2022 (bsc#1198581)\n\n- CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)\n- CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)\n- CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)\n- CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)\n- CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)\n- CVE-2022-28735: Fixed some verifier framework changes (bsc#1198495)\n- CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)\n- Update SBAT security contact (bsc#1193282)\n- Bump grub's SBAT generation to 2\n\n- Use boot disks in OpenFirmware, fixing regression caused when the root LV is completely in the boot LUN (bsc#1197948)\n","status":"published","published":"2022-06-13T13:35:35Z","modified":"2026-02-04T04:11:13.499252Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2073-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity fixes and hardenings for boothole 3 / boothole 2022 (bsc#1198581)\n\n- CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)\n- CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)\n- CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)\n- CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)\n- CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)\n- CVE-2022-28735: Fixed some verifier framework changes (bsc#1198495)\n- CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)\n- Update SBAT security contact (bsc#1193282)\n- Bump grub's SBAT generation to 2\n\nOther bugs fixed:\n\n- Use boot disks in OpenFirmware, fixing regression caused when the root LV is completely in the boot LUN (bsc#1197948)\n- Fix grub-install error when efi system partition is created as mdadm software raid1 device (bsc#1179981) (bsc#1195204)\n- Fix error in grub-install when linux root device is on lvm thin volume (bsc#1192622) (bsc#1191974)\n- Fix wrong default entry when booting snapshot (bsc#1159205)\n- Add support for simplefb (boo#1193532).\n- Fix error lvmid disk cannot be found after second disk added to the root volume group (bsc#1189874) (bsc#1071559)\n- Fix error /boot/grub2/locale/POSIX.gmo not found (bsc#1189769)\n- Fix unknown TPM error on buggy uefi firmware (bsc#1191504)\n- Fix arm64 kernel image not aligned on 64k boundary (bsc#1192522)\n","status":"published","published":"2022-06-14T09:59:27Z","modified":"2026-02-04T03:55:05.556694Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2074-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity fixes and hardenings for boothole 3 / boothole 2022 (bsc#1198581)\n\n- CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)\n- CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)\n- CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)\n- CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)\n- CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)\n- CVE-2022-28735: Fixed some verifier framework changes (bsc#1198495)\n- CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)\n- Update SBAT security contact (bsc#1193282)\n- Bump grub's SBAT generation to 2\n\n- Use boot disks in OpenFirmware, fixing regression caused when the root LV is completely in the boot LUN (bsc#1197948)\n","status":"published","published":"2022-06-14T10:00:13Z","modified":"2026-02-04T03:41:52.203351Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"USN-6355-1","title":"grub2-signed, grub2-unsigned, shim, and shim-signed vulnerability","description":"Daniel Axtens discovered that specially crafted images could cause a\nheap-based out-of-bonds write. A local attacker could possibly use\nthis to circumvent secure boot protections. (CVE-2021-3695)\n\nDaniel Axtens discovered that specially crafted images could cause\nout-of-bonds read and write. A local attacker could possibly use this\nto circumvent secure boot protections. (CVE-2021-3696)\n\nDaniel Axtens discovered that specially crafted images could cause\nbuffer underwrite which allows arbitrary data to be written to a heap.\nA local attacker could possibly use this to circumvent secure\nboot protections. (CVE-2021-3697)\n\nIt was discovered that GRUB2 configuration files were created with\nthe wrong permissions. An attacker could possibly use this to leak\nencrypted passwords. (CVE-2021-3981)\n\nDaniel Axtens discovered that specially crafted IP packets could cause\nan integer underflow and write past the end of a buffer. An attacker\ncould possibly use this to circumvent secure boot protections.\n(CVE-2022-28733)\n\nDaniel Axtens discovered that specially crafted HTTP headers can cause\nan out-of-bounds write of a NULL byte. An attacker could possibly use\nthis to corrupt GRUB2's internal data. (CVE-2022-28734)\n\nJulian Andres Klode discovered that GRUB2 shim_lock allowed non-\nkernel files to be loaded. A local attack could possibly use this to\ncircumvent secure boot protections. (CVE-2022-28735)\n\nChris Coulson discovered that executing chainloaders more than once\ncaused a use-after-free vulnerability. A local attack could possibly\nuse this to circumvent secure boot protections. (CVE-2022-28736)\n\nChris Coulson discovered that specially crafted executables could\ncause shim to make out-of-bound writes. A local attack could possibly\nuse this to circumvent secure boot protections. (CVE-2022-28737)\n\nZhang Boyang discovered that specially crafted unicode sequences\ncould lead to an out-of-bounds write to a heap. A local attacker could\npossibly use this to circumvent secure boot protections.\n(CVE-2022-3775)\n","status":"published","published":"2023-09-08T21:56:31Z","modified":"2026-05-29T18:00:45.326898665Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}