MediumFix available
binutils — security advisory
A flaw was found in GNU Binutils 2.35.1, where there is a heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c due to the number of symbols not calculated correctly. The highest threat from this vulnerability is to system availability.
- Products
- binutils
- Affected versions
- Not specified
- Fixed versions
- 2.37-3
- CVEs
- CVE-2021-20284
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:18 UTC · Revision 1
Source evidence
A flaw was found in GNU Binutils 2.35.1, where there is a heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c due to the number of symbols not calculated correctly. The highest threat from this vulnerability is to system availability.
osv:DEBIAN-CVE-2021-20284
binutils
Fixed versions: 2.37-3
binutils
Fixed versions: 2.37-3
binutils
Fixed versions: 2.37-3
Complete source record
{
"id": "a924bb9a22766c1b8dc02183bbf0ebfc5017deee1f048bb06ed446fcd1fd6b00",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-20284",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2021-20284",
"summary": "A flaw was found in GNU Binutils 2.35.1, where there is a heap-based buffer overflow in _bfd_elf_slurp_secondary_reloc_section in elf.c due to the number of symbols not calculated correctly. The highest threat from this vulnerability is to system availability.",
"evidence": "osv:DEBIAN-CVE-2021-20284",
"products": [
{
"name": {
"value": "binutils",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.37-3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "binutils",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.37-3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "binutils",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.37-3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2021-20284",
"aliases": [
"DEBIAN-CVE-2021-20284"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37-3"
}
]
}
],
"package": {
"name": "binutils",
"purl": "pkg:deb/debian/binutils?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20284.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37-3"
}
]
}
],
"package": {
"name": "binutils",
"purl": "pkg:deb/debian/binutils?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20284.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37-3"
}
]
}
],
"package": {
"name": "binutils",
"purl": "pkg:deb/debian/binutils?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-20284.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T18:03:10.385652386Z",
"provider": "osv",
"upstream": [
"CVE-2021-20284"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2021-20284"
]
},
"related_cves": [
{
"value": "CVE-2021-20284",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420678,
"published_at": "2021-03-26T17:15:13.063+00:00"
}