{"id":"CVE-2022-3775","aliases":["ALSA-2023:0049","ALSA-2023:0752","AZL-12079","AZL-34792","BELL-CVE-2022-3775","CLSA-2023-1674815966","CLSA-2023-1674816097","CLSA-2024-1724266264","DEBIAN-CVE-2022-3775","DLA-3190-1","DLA-3190-2","DSA-5280-1","EUVD-2022-43125","GHSA-8h84-vmjf-pcmj","OESA-2022-2118","RHSA-2022:8494","RHSA-2022:8800","RHSA-2022:8978","RHSA-2023:0047","RHSA-2023:0048","RHSA-2023:0049","RHSA-2023:0752","RLSA-2023:0049","RLSA-2023:0752","SUSE-SU-2022:4140-1","SUSE-SU-2022:4141-1","SUSE-SU-2022:4142-1","SUSE-SU-2022:4143-1","SUSE-SU-2022:4144-1","SUSE-SU-2022:4218-1","SUSE-SU-2022:4219-1","SUSE-SU-2022:4302-1","SUSE-SU-2023:1701-1","UBUNTU-CVE-2022-3775","USN-6355-1","openSUSE-SU-2024:12517-1"],"status":"published","title":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the...","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01044,"percentile":0.64348,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2022-11-15T00:00:00Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Azure Linux:2","package":"grub2","fixed_in":["2.06-10"],"sources":["osv"]},{"ecosystem":"Azure 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Advisory","advisory"]},{"url":"https://security.gentoo.org/glsa/202311-14","tags":["vendor-advisory","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-3775","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-8h84-vmjf-pcmj"},{"url":"https://access.redhat.com/errata/RHSA-2023:0049","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2022-2601","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2022-3775","tags":["report"]},{"url":"https://bugzilla.redhat.com/2112975","tags":["report"]},{"url":"https://bugzilla.redhat.com/2138880","tags":["report"]},{"url":"https://errata.almalinux.org/8/ALSA-2023-0049.html","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2023:0752","tags":["advisory"]},{"url":"https://errata.almalinux.org/9/ALSA-2023-0752.html","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2022-3775","tags":["advisory"]},{"url":"https://errata.cloudlinux.com/centos8.4-els/CLSA-2023-1674815966.html","tags":["advisory"]},{"url":"https://errata.cloudlinux.com/centos8.5-els/CLSA-2023-1674816097.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/centos8stream-els/CLSA-2024-1724266264.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2022-3775","tags":["advisory"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-2118","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-2601","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2022:8494","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2112975","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2138880","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_8494.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-2601","tags":["advisory"]},{"url":"https://lists.gnu.org/archive/html/grub-devel/2022-11/msg00059.html","tags":["article","report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-3775","tags":["advisory","report"]},{"url":"https://access.redhat.com/errata/RHSA-2022:8800","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_8800.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2022:8978","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_8978.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2023:0047","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_0047.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2023:0048","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_0048.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_0049.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_0752.json","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2023:0049","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2023:0752","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224140-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1205178","tags":["report"]},{"url":"https://bugzilla.suse.com/1205182","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2022-2601","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-3775","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224141-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224142-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224143-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224144-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224218-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224219-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20224302-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1205520","tags":["report"]},{"url":"https://bugzilla.suse.com/1205554","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20231701-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1205200","tags":["report"]},{"url":"https://bugzilla.suse.com/1209188","tags":["report"]},{"url":"https://bugzilla.suse.com/1209829","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-3775","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-2022-28733","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28734","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-28735","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-2022-3775","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T00:00:00Z","modified":"2026-05-27T13:54:16.609Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-787","CWE-787"],"updated_at":"2026-11-02T14:34:32.843656Z"}],"euvd":[{"id":"EUVD-2022-43125","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T00:00:00Z","modified":"2026-05-27T13:54:16Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:04.78276Z"}],"ghsa":[{"id":"GHSA-8h84-vmjf-pcmj","title":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the...","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T21:30:28Z","modified":"2023-11-25T12:30:21Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:55:06.358976Z"}],"nvd":[{"id":"CVE-2022-3775","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:11.427Z","modified":"2026-06-17T05:00:17.087Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:34.031641Z"}],"osv":[{"id":"AZL-12079","title":"CVE-2022-3775 affecting package grub2 for versions less than 2.06-10","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:11Z","modified":"2026-04-21T04:22:23.188984Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:02.666535Z"},{"id":"AZL-34792","title":"CVE-2022-3775 affecting package grub2 for versions less than 2.06-14","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:11Z","modified":"2026-11-05T05:40:51Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-05T16:41:19.380321Z"},{"id":"BELL-CVE-2022-3775","title":"CVE-2022-3775 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:16:27.290249Z","modified":"2026-01-26T09:49:54.599604Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:17.151188Z"},{"id":"CVE-2022-3775","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:11.427Z","modified":"2026-03-15T22:00:43.050638Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:26.53798Z"},{"id":"OESA-2022-2118","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.Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, in turn, initializes the rest of the operating system (e.g. GNU).\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention.(CVE-2022-2601)\r\n\r\nA flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this issue, allowing modifications in unauthorized memory segments, causing data integrity problems or leading to denial of service.(CVE-2022-3775)","status":"published","published":"2022-11-25T11:05:26Z","modified":"2026-08-18T01:17:26.883252356Z","cvss":[{"version":"3.1","score":6.4,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:39.934788Z"},{"id":"RHSA-2022:8494","title":"Red Hat Security Advisory: grub2 security update","status":"published","published":"2024-09-16T09:44:48Z","modified":"2026-05-28T10:02:16Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2022:8800","title":"Red Hat Security Advisory: grub2 security update","status":"published","published":"2024-09-16T09:44:57Z","modified":"2026-05-28T10:02:16Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2022:8978","title":"Red Hat Security Advisory: grub2 security and bug fix update","status":"published","published":"2024-09-16T09:45:04Z","modified":"2026-05-28T10:02:17Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2023:0047","title":"Red Hat Security Advisory: grub2 security update","status":"published","published":"2024-09-16T09:45:21Z","modified":"2026-05-28T10:02:19Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2023:0048","title":"Red Hat Security Advisory: grub2 security and bug fix update","status":"published","published":"2024-09-16T09:45:12Z","modified":"2026-05-28T10:02:20Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2023:0049","title":"Red Hat Security Advisory: grub2 security update","status":"published","published":"2024-09-16T09:45:30Z","modified":"2026-05-28T10:02:20Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2023:0752","title":"Red Hat Security Advisory: grub2 security update","status":"published","published":"2024-09-16T09:45:40Z","modified":"2026-05-28T10:02:22Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.611604Z"},{"id":"RLSA-2023:0049","title":"Moderate: grub2 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\nSecurity Fix(es):\n\n* grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)\n\n* grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)\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":"2023-01-09T14:23:31Z","modified":"2026-02-05T12:15:08.234369Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"RLSA-2023:0752","title":"Moderate: grub2 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\nSecurity Fix(es):\n\n* grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)\n\n* grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)\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":"2023-02-16T06:35:52.323618Z","modified":"2026-02-04T11:15:10.533919Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"UBUNTU-CVE-2022-3775","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:00Z","modified":"2026-05-29T18:00:21.63819297Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:53:54.697021Z"},{"id":"ALSA-2023:0049","title":"Moderate: grub2 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\nSecurity Fix(es):\n\n* grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)\n* grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)\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":"2023-01-09T00:00:00Z","modified":"2026-10-29T11:01:56.274176352Z","updated_at":"2026-11-02T15:27:51.655726Z"},{"id":"ALSA-2023:0752","title":"Moderate: grub2 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\nSecurity Fix(es):\n\n* grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass (CVE-2022-2601)\n* grub2: Heap based out-of-bounds write when redering certain unicode sequences (CVE-2022-3775)\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":"2023-02-14T00:00:00Z","modified":"2026-10-29T11:31:23.277928586Z","updated_at":"2026-11-02T15:27:51.655726Z"},{"id":"CLSA-2023-1674815966","title":"grub2: Fix of 2 CVEs","description":"- font: Reject glyphs exceeds font-\u003emax_glyph_width or font-\u003emax_glyph height\n- font: Fix size overflow in grub_font_get_glyph_internal()\n- CVE-2022-2601: font: Fix several integer overflows in grub_font_construct_glyph()\n- CVE-2022-3775: font: Fix an integer underflow in blit_comb()","status":"published","published":"2023-01-27T10:39:26Z","modified":"2026-06-01T00:33:20.354246804Z","updated_at":"2026-11-02T15:43:40.176048Z"},{"id":"CLSA-2023-1674816097","title":"grub2: Fix of 2 CVEs","description":"- font: Reject glyphs exceeds font-\u003emax_glyph_width or font-\u003emax_glyph height\n- font: Fix size overflow in grub_font_get_glyph_internal()\n- CVE-2022-2601: font: Fix several integer overflows in grub_font_construct_glyph()\n- CVE-2022-3775: font: Fix an integer underflow in blit_comb()","status":"published","published":"2023-01-27T10:41:37Z","modified":"2026-06-01T00:33:21.772240399Z","updated_at":"2026-11-02T15:43:40.176048Z"},{"id":"CLSA-2024-1724266264","title":"grub2: Fix of 12 CVEs","description":"- Fix package version number\n- Use CloudLinux vendor cert\n- Make this package installable only on a system having Cloudlinux signed\n  components: grub2 and kernel\n- Add patches from centos-8.5 ELS:\n- CVE-2021-3695: out-of-bounds write in the heap area by a crafted 16-bit\n  grayscale PNG image\n- CVE-2021-3696: a heap out-of-bounds during the handling of Huffman tables\n  in the PNG reader\n- CVE-2021-3697: allowing user-controlled data to be written in heap by a\n  crafted JPEG image\n- CVE-2022-2601: possible circumventing of the secure boot mechanism by a\n  malicious crafted pf2 font\n- CVE-2022-28733: possible write past the end of the buffer because of\n  integer underflow in grub_net_recv_ip4_packets()\n- CVE-2022-28734: out-of-bounds write when handling split HTTP headers\n- CVE-2022-28736: use-after-free vulnerability in grub_cmd_chainloader()\n- CVE-2022-3775: out-of-bounds write into grub2’s heap because of lack of\n  proper validation of glyph’s width and height\n- CVE-2023-4692: out-of-bounds write in grub2’s NTFS filesystem driver\n- The following CVEs were fixed by previous patches additionally:\n- CVE-2020-15706: a race condition in grub_script_function_create() leading\n  to a use-after-free vulnerability\n- CVE-2020-15707: integer overflows in efilinux leading to a heap-based\n  buffer overflow\n- A number of upstream fixes backported including:\n- CVE-2024-1048: a flaw that may result in filesystem running out of free\n  inodes or blocks","status":"published","published":"2024-08-21T19:58:03Z","modified":"2026-10-21T10:45:47.517781586Z","updated_at":"2026-11-02T15:43:41.281406Z"},{"id":"DEBIAN-CVE-2022-3775","description":"When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.","status":"published","published":"2022-12-19T20:15:11.427Z","modified":"2026-11-03T06:02:57.263318079Z","updated_at":"2026-11-03T06:43:19.563245Z"},{"id":"DLA-3190-1","title":"grub2 - security update","status":"published","published":"2022-11-16T00:00:00Z","modified":"2026-03-09T01:22:38.996207Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DLA-3190-2","title":"grub2 - security update","status":"published","published":"2022-12-10T00:00:00Z","modified":"2026-03-09T01:19:37.972945Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DSA-5280-1","title":"grub2 - security update","status":"published","published":"2022-11-15T00:00:00Z","modified":"2026-03-09T02:10:11.215977Z","updated_at":"2026-11-02T15:46:17.543497Z"},{"id":"openSUSE-SU-2024:12517-1","title":"grub2-2.06-31.1 on GA media","description":"These are all security issues fixed in the grub2-2.06-31.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:39:33.409415Z","updated_at":"2026-11-02T16:58:35.751245Z"},{"id":"SUSE-SU-2022:4140-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n\nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-21T08:27:41Z","modified":"2026-02-04T04:35:14.542817Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4141-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-21T08:28:27Z","modified":"2026-02-04T02:29:18.521229Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4142-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity Fixes:\n    \n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-21T08:29:08Z","modified":"2026-02-04T02:49:52.985049Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4143-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity Fixes:\n    \n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-21T08:29:23Z","modified":"2026-02-04T04:20:10.403089Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4144-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity Fixes:\n    \n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-21T08:29:34Z","modified":"2026-02-04T02:42:41.95381Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4218-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-25T08:39:28Z","modified":"2026-02-04T04:01:37.951719Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4219-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n","status":"published","published":"2022-11-25T08:40:02Z","modified":"2025-05-02T04:32:56.911704Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2022:4302-1","title":"Security update for grub2","description":"This update for grub2 fixes the following issues:\n\nSecurity Fixes:\n    \n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n    \nOther:\n\n- Bump upstream SBAT generation to 3\n- Fix unreadable filesystem with xfs v4 superblock (bsc#1205520).\n- Remove zfs modules (bsc#1205554).\n","status":"published","published":"2022-12-01T08:11:14Z","modified":"2026-02-04T04:05:02.514972Z","updated_at":"2026-11-02T15:53:51.853735Z"},{"id":"SUSE-SU-2023:1701-1","title":"Security update for grub2","description":"\nThis security update of grub2 fixes the following issues:\n\n- CVE-2022-2601: Fixed buffer overflow in grub_font_construct_glyph (bsc#1205178).\n- CVE-2022-3775: Fixed integer underflow in blit_comb() (bsc#1205182).\n- Bump upstream SBAT generation to 3\n\n- rebuild the package with the new secure boot key (bsc#1209188).\n\nOther:\n\n- Remove zfs modules (bsc#1205554)\n- Make grub.cfg invariant to efi and legacy platforms (bsc#1205200)\n","status":"published","published":"2023-03-30T11:13:54Z","modified":"2026-02-04T03:29:52.42036Z","updated_at":"2026-11-02T15:53:52.350754Z"},{"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"}]}}