UnratedFix available
Fix CVE(s): CVE-2021-42380
Type: advisorySources: OSV
* SECURITY UPDATE: awk: use-after-realloc in evaluate() when a $N field reference reallocates Fields[] while another operand still points into it - debian/patches/CVE-2021-42380.patch: Read L values before evaluating R, cap fsrealloc size, and rebase L.v when Fields[] moved during evaluation of R - debian/patches/CVE-2021-42380-tests.patch: add regression test - CVE-2021-42380
- Products
- busybox, busybox-initramfs, busybox-static, busybox-syslogd, udhcpc, udhcpd
- Affected versions
- Not specified
- Fixed versions
- 1:1.27.2-2ubuntu3.4+tuxcare.els3
- CVEs
- CVE-2021-42380
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:43 UTC · Revision 1
Source evidence
* SECURITY UPDATE: awk: use-after-realloc in evaluate() when a $N field reference reallocates Fields[] while another operand still points into it - debian/patches/CVE-2021-42380.patch: Read L values before evaluating R, cap fsrealloc size, and rebase L.v when Fields[] moved during evaluation of R - debian/patches/CVE-2021-42380-tests.patch: add regression test - CVE-2021-42380
osv:CLSA-2026-1792760111
busybox
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
busybox-initramfs
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
busybox-static
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
busybox-syslogd
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
udhcpc
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
udhcpd
Fixed versions: 1:1.27.2-2ubuntu3.4+tuxcare.els3
Complete source record
{
"id": "b19fc7c0ff66babebdea05b6e40410dddc699dd3b820a782108df930d602aeca",
"url": "https://osv.dev/vulnerability/CLSA-2026-1792760111",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2021-42380",
"summary": "* SECURITY UPDATE: awk: use-after-realloc in evaluate() when a $N field reference reallocates Fields[] while another operand still points into it - debian/patches/CVE-2021-42380.patch: Read L values before evaluating R, cap fsrealloc size, and rebase L.v when Fields[] moved during evaluation of R - debian/patches/CVE-2021-42380-tests.patch: add regression test - CVE-2021-42380",
"evidence": "osv:CLSA-2026-1792760111",
"products": [
{
"name": {
"value": "busybox",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "busybox-initramfs",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "busybox-static",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "busybox-syslogd",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "udhcpc",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "udhcpd",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:1.27.2-2ubuntu3.4+tuxcare.els3",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1792760111",
"aliases": [
"CLSA-2026-1792760111"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "busybox",
"purl": "pkg:deb/tuxcare/busybox?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "busybox-initramfs",
"purl": "pkg:deb/tuxcare/busybox-initramfs?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "busybox-static",
"purl": "pkg:deb/tuxcare/busybox-static?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "busybox-syslogd",
"purl": "pkg:deb/tuxcare/busybox-syslogd?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "udhcpc",
"purl": "pkg:deb/tuxcare/udhcpc?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:1.27.2-2ubuntu3.4+tuxcare.els3"
}
]
}
],
"package": {
"name": "udhcpd",
"purl": "pkg:deb/tuxcare/udhcpd?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1792760111.json"
}
}
],
"modified": "2026-10-26T09:32:04.593577224Z",
"provider": "osv",
"upstream": [
"CVE-2021-42380"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1792760111.html",
"https://nvd.nist.gov/vuln/detail/CVE-2021-42380"
]
},
"related_cves": [
{
"value": "CVE-2021-42380",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449621,
"published_at": "2026-10-23T12:55:23+00:00"
}