UnratedFix available
grub2: Fix of 7 CVEs
Type: advisorySources: OSV
- CVE-2021-3981: Fix default privileges of grub.cfg file - CVE-2022-28736: Fix use-after-free bug when grub_cmd_chainloader is executed more than once before a boot attempt is performed. - CVE-2021-3695: Drop greyscale support to fix heap out-of-bounds write - CVE-2021-3696: Fix out of range insertion into huffman table - CVE-2021-3697: Fix integer undeflow which resulted in wild pointer write - CVE-2022-28733: Fix integer underflow which resulted in subsequent unpleasantness - CVE-2022-28734: Fix erros in handling of split http headers
- Products
- grub2-common, grub2-efi-ia32, grub2-efi-ia32-cdboot, grub2-efi-ia32-modules, grub2-efi-x64, grub2-efi-x64-cdboot, grub2-efi-x64-modules, grub2-pc, grub2-pc-modules, grub2-tools, grub2-tools-efi, grub2-tools-extra, grub2-tools-minimal
- Affected versions
- Not specified
- Fixed versions
- 1:2.02-106.el8.tuxcare.els2
- CVEs
- CVE-2021-3695, CVE-2021-3696, CVE-2021-3697, CVE-2021-3981, CVE-2022-28733, CVE-2022-28734, CVE-2022-28736
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 14:08 UTC · Revision 1
Source evidence
- CVE-2021-3981: Fix default privileges of grub.cfg file - CVE-2022-28736: Fix use-after-free bug when grub_cmd_chainloader is executed more than once before a boot attempt is performed. - CVE-2021-3695: Drop greyscale support to fix heap out-of-bounds write - CVE-2021-3696: Fix out of range insertion into huffman table - CVE-2021-3697: Fix integer undeflow which resulted in wild pointer write - CVE-2022-28733: Fix integer underflow which resulted in subsequent unpleasantness - CVE-2022-28734: Fix erros in handling of split http headers
osv:CLSA-2022-1669390018
grub2-common
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-ia32
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-ia32-cdboot
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-ia32-modules
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-x64
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-x64-cdboot
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-efi-x64-modules
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-pc
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-pc-modules
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-tools
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-tools-efi
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-tools-extra
Fixed versions: 1:2.02-106.el8.tuxcare.els2
grub2-tools-minimal
Fixed versions: 1:2.02-106.el8.tuxcare.els2
Complete source record
{
"id": "f398842bb9935c2c3c2149425566f16edc8524ed9c6291cecc0e3d781ba87829",
"url": "https://osv.dev/vulnerability/CLSA-2022-1669390018",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "grub2: Fix of 7 CVEs",
"summary": "- CVE-2021-3981: Fix default privileges of grub.cfg file - CVE-2022-28736: Fix use-after-free bug when grub_cmd_chainloader is executed more than once before a boot attempt is performed. - CVE-2021-3695: Drop greyscale support to fix heap out-of-bounds write - CVE-2021-3696: Fix out of range insertion into huffman table - CVE-2021-3697: Fix integer undeflow which resulted in wild pointer write - CVE-2022-28733: Fix integer underflow which resulted in subsequent unpleasantness - CVE-2022-28734: Fix erros in handling of split http headers",
"evidence": "osv:CLSA-2022-1669390018",
"products": [
{
"name": {
"value": "grub2-common",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-ia32",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-ia32-cdboot",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-ia32-modules",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-x64",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-x64-cdboot",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-efi-x64-modules",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-pc",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-pc-modules",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-tools",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-tools-efi",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-tools-extra",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "grub2-tools-minimal",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:2.02-106.el8.tuxcare.els2",
"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2022-1669390018",
"aliases": [
"CLSA-2022-1669390018"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-common",
"purl": "pkg:rpm/tuxcare/grub2-common?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-ia32",
"purl": "pkg:rpm/tuxcare/grub2-efi-ia32?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-ia32-cdboot",
"purl": "pkg:rpm/tuxcare/grub2-efi-ia32-cdboot?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-ia32-modules",
"purl": "pkg:rpm/tuxcare/grub2-efi-ia32-modules?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-x64",
"purl": "pkg:rpm/tuxcare/grub2-efi-x64?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-x64-cdboot",
"purl": "pkg:rpm/tuxcare/grub2-efi-x64-cdboot?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-efi-x64-modules",
"purl": "pkg:rpm/tuxcare/grub2-efi-x64-modules?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-pc",
"purl": "pkg:rpm/tuxcare/grub2-pc?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-pc-modules",
"purl": "pkg:rpm/tuxcare/grub2-pc-modules?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-tools",
"purl": "pkg:rpm/tuxcare/grub2-tools?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-tools-efi",
"purl": "pkg:rpm/tuxcare/grub2-tools-efi?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-tools-extra",
"purl": "pkg:rpm/tuxcare/grub2-tools-extra?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2.02-106.el8.tuxcare.els2"
}
]
}
],
"package": {
"name": "grub2-tools-minimal",
"purl": "pkg:rpm/tuxcare/grub2-tools-minimal?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2022-1669390018.json"
}
}
],
"modified": "2026-10-21T10:48:23.966970416Z",
"provider": "osv",
"upstream": [
"CVE-2021-3695",
"CVE-2021-3696",
"CVE-2021-3697",
"CVE-2021-3981",
"CVE-2022-28733",
"CVE-2022-28734",
"CVE-2022-28736"
],
"references": [
"https://errata.cloudlinux.com/centos8.5-els/CLSA-2022-1669390018.html"
]
},
"related_cves": [
{
"value": "CVE-2021-3695",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3696",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3697",
"evidence": "/upstream"
},
{
"value": "CVE-2021-3981",
"evidence": "/upstream"
},
{
"value": "CVE-2022-28733",
"evidence": "/upstream"
},
{
"value": "CVE-2022-28734",
"evidence": "/upstream"
},
{
"value": "CVE-2022-28736",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 392955,
"published_at": "2022-11-25T15:26:58+00:00"
}