MediumFix available
grub — security advisory
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
- Products
- grub
- Affected versions
- Not specified
- Fixed versions
- 2.06-r0
- CVEs
- CVE-2020-15706
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:03 UTC · Revision 1
Source evidence
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
osv:ALPINE-CVE-2020-15706
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
grub
Fixed versions: 2.06-r0
Complete source record
{
"id": "c3596374e4c6b6e557347443b10ea24c8201ac48001d8ada1d10538f3407c992",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-15706",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-15706",
"summary": "GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.",
"evidence": "osv:ALPINE-CVE-2020-15706",
"products": [
{
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"evidence": "/affected/0/package/name"
},
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"fixed_versions": [
{
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"evidence": "/affected/0/ranges"
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},
{
"name": {
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"evidence": "/affected/1/package/name"
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{
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}
],
"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
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"package": {
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"purl": "pkg:apk/alpine/grub?arch=source",
"ecosystem": "Alpine:v3.17"
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"database_specific": {
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"package": {
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"ecosystem": "Alpine:v3.18"
},
"database_specific": {
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"package": {
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"package": {
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"package": {
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"ecosystem": "Alpine:v3.21"
},
"database_specific": {
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],
"package": {
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"ecosystem": "Alpine:v3.22"
},
"database_specific": {
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],
"package": {
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"ecosystem": "Alpine:v3.23"
},
"database_specific": {
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{
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"package": {
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"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-15706.json"
},
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}
],
"modified": "2026-10-26T11:17:55.135232035Z",
"provider": "osv",
"upstream": [
"CVE-2020-15706"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-15706"
]
},
"related_cves": [
{
"value": "CVE-2020-15706",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450446,
"published_at": "2020-07-29T18:15:14.42+00:00"
}