Medium
Security advisory
The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-10029
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:28 UTC · Revision 1
Source evidence
The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.
osv:CVE-2020-10029
Complete source record
{
"id": "ef04f9c3630179be3f6e266a1890279a2c15781f9c2baee85bee0cdb275839c8",
"url": "https://osv.dev/vulnerability/CVE-2020-10029",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-10029",
"summary": "The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.",
"evidence": "osv:CVE-2020-10029",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-10029",
"aliases": [
"CVE-2020-10029"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://sourceware.org/git/glibc.git",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3de512be7ea6053255afed6154db9ee31d4e557a"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.32"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-10029.json"
}
}
],
"modified": "2026-10-24T10:30:53.709466743Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://cert-portal.siemens.com/productcert/html/ssa-831302.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/23N76M3EDP2GIW4GOIQRYTKRE7PPBRB2/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JZTFUD5VH2GU3YOXA2KBQSBIDZRDWNZ3/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU5JJGENOK7K4X5RYAA5PL647C6HD22E/",
"https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=9333498794cde1d5cca518badf79533a24114b6f",
"https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html",
"https://security.gentoo.org/glsa/202006-04",
"https://security.netapp.com/advisory/ntap-20200327-0003/",
"https://usn.ubuntu.com/4416-1/",
"https://sourceware.org/bugzilla/show_bug.cgi?id=25487"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*"
],
"vendor_product": "gnu:glibc",
"extracted_events": [
{
"range": [
{
"fixed": "2.32.0"
},
{
"fixed": "2.32.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "19.10"
},
{
"last_affected": "19.10"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "30"
},
{
"last_affected": "30"
},
{
"introduced": "31"
},
{
"last_affected": "31"
},
{
"introduced": "32"
},
{
"last_affected": "32"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-10029",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437984,
"published_at": "2020-03-04T15:15:13.083+00:00"
}