Critical
Security advisory
GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-46848
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 13:02 UTC · Revision 1
Source evidence
GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der.
osv:CVE-2021-46848
Complete source record
{
"id": "10346a058844a8c75422ffdf835a407823df63f7feb32ae02f77a9cc67706a36",
"url": "https://osv.dev/vulnerability/CVE-2021-46848",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-46848",
"summary": "GNU Libtasn1 before 4.19.0 has an ETYPE_OK off-by-one array size check that affects asn1_encode_simple_der.",
"evidence": "osv:CVE-2021-46848",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2021-46848",
"aliases": [
"CVE-2021-46848"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://gitlab.com/gnutls/libtasn1",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2b7ee166f031bea63c5e7badcedc69f1cea69c89"
},
{
"fixed": "44a700d2051a666235748970c2df047ff207aeb5"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:gnu:libtasn1:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.19.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "44a700d2051a666235748970c2df047ff207aeb5"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"v4.17.0",
"v4.16.0",
"libtasn1_4_16_0",
"4.16.0",
"libtasn1_4_15_0",
"libtasn1_4_14",
"libtasn1_4_13",
"libtasn1_4_12",
"libtasn1_4_11",
"libtasn1_4_9",
"libtasn1_4_8",
"libtasn1_4.7",
"libtasn1_4_6",
"libtasn1_4_5",
"libtasn1_4_4",
"libtasn1_4_3",
"libtasn1_4_2",
"libtasn1_4_1",
"libtasn1_4_0",
"libtasn1_3_6",
"libtasn1_3_5",
"libtasn1_3_4",
"libtasn1_3_3",
"libtasn1_3_2",
"libtasn1_3_1",
"libtasn1_3_0",
"libtasn1_2_13",
"libtasn1_2_12",
"libtasn1_2_11",
"libtasn1_2_10",
"libtasn1_2_9",
"libtasn1_2_8",
"libtasn1_2_7",
"libtasn1_2_6",
"libtasn1_2_5",
"libtasn1_2_4",
"libtasn1_2_3",
"libtasn1_2_2",
"libtasn1_2_1",
"libtasn1_2_0",
"libtasn1_1_6",
"libtasn1_1_5",
"libtasn1_1_4",
"libtasn1_1_3",
"libtasn1_1_2",
"libtasn1_1_1",
"libtasn1_1_0",
"libtasn1_0_3_10",
"libtasn1_0_3_9",
"libtasn1_0_3_8",
"libtasn1_0_3_7",
"libtasn1_0_3_6",
"libtasn1_0_3_5",
"libtasn1_0_3_4",
"libtasn1_0_3_3",
"libtasn1_0_3_2",
"libtasn1-0-3-2",
"libtasn1_0_3_1",
"libtasn1_0_3_0",
"libtasn1_0_2_18",
"libtasn1_0_2_17",
"libtasn1_0_2_16",
"libtasn1_0_2_15",
"libtasn1_0_2_14",
"libtasn1_0_2_13",
"libtasn1_0_2_12",
"libtasn1_0_2_11",
"libtasn1_0_2_10",
"libtasn1_0_2_9",
"libtasn1_0_2_8",
"libtasn1_0_2_7",
"libtasn1_0_2_6",
"libtasn1_0_2_5",
"libtasn1_0_2_4",
"libtasn1_0_2_3",
"libtasn1_0_2_2",
"libtasn1_0_2_1",
"libtasn1_0_2_0",
"libtasn1_0_1_2",
"gnutls_0_5_1",
"gnutls_0_5_0",
"libtasn1_after_rename",
"libasn1_0_1_0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46848.json",
"vanir_signatures": [
{
"id": "CVE-2021-46848-7660d0ca",
"digest": {
"threshold": 0.9,
"line_hashes": [
"180900001376631709891623456653421985644",
"86988387996833609858408414136069345084",
"224585302465881495030456921739265879297",
"137788088335804504219050604484537465829"
]
},
"source": "https://gitlab.com/gnutls/libtasn1@44a700d2051a666235748970c2df047ff207aeb5",
"target": {
"file": "lib/int.h"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:31:43Z"
}
}
],
"modified": "2026-10-20T14:31:43.624647398Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AV4SHDJF2XLB4CUPTBPQQ6CLGZ5LKXPZ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ECM2ELTVRYV4BZ5L5GMIRQE27RFHPAQ6/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGO7XST4EIJGX4B2ITZCYSWM24534BSU/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V5LWOGF7QRMNFRUCZY6TDYQJVFI6MOQ2/",
"https://lists.debian.org/debian-lts-announce/2023/01/msg00003.html",
"https://security.netapp.com/advisory/ntap-20221118-0006/",
"https://gitlab.com/gnutls/libtasn1/-/issues/32",
"https://bugs.gentoo.org/866237",
"https://gitlab.com/gnutls/libtasn1/-/commit/44a700d2051a666235748970c2df047ff207aeb5"
],
"provider_metadata": {
"unresolved_ranges": [
{
"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:35:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "35"
},
{
"last_affected": "35"
},
{
"introduced": "36"
},
{
"last_affected": "36"
},
{
"introduced": "37"
},
{
"last_affected": "37"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-46848",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 389703,
"published_at": "2022-10-24T14:15:49.973+00:00"
}